Update invoice settings

Partially updates invoice-specific settings including language, reminder fees, interest rates, and custom text templates. Only provided fields are updated; omitted fields remain unchanged.

What can be updated:

Invoice language
Reminder fee settings (enable/disable, amount)
Interest settings (enable/disable, base rate, rate)
Custom text templates (accepts HTML or Markdown)

Settings behavior:

Setting a value to null will use the parent setting (organization or workspace default)
Custom texts can be provided as HTML or Markdown and will be converted to internal format
Empty custom texts are treated as null (uses defaults)

Custom text templates: All custom text fields support invoice variables (e.g., #invoiceNumber, #projectName, #clientCompanyName). See the invoice text variables documentation for a complete list of available variables.

What is returned: Updated invoice settings with custom texts returned as HTML.

PATCH/billing/invoices/{id}/settings

Authorization

AuthorizationOAuth2 access token · headerrequired

Scopes:api:write

AuthorizationBearer token (JWT) · headerrequired

Path parameters

idstring<uuid>required

Invoice ID (UUID)

Query parameters

fieldsToReturnstring

Comma-separated list of top-level response fields to return. Overrides the endpoint compact default unless responseShape=full is used.

responseShapestring

Advanced override. Omit for the endpoint compact default. Use full only when you need the complete endpoint response, including nested fields that are not selectable with fieldsToReturn.

Allowed:compactfull

Header parameters

LT-Response-Shapestring

Advanced override. Set to full only when you need the complete endpoint response, including nested fields that are not selectable with fieldsToReturn.

Allowed:full

Request body

requiredapplication/json

Invoice settings to update (all fields optional)

baseInvoiceInterestobject | null

Base invoice interest rate percentage (0-1000)

customTextsobject

Custom invoice text templates. Content can be provided as HTML or Markdown and will be converted to internal format.

Show properties

cancelationBodyobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

For quick/simple text, Markdown is acceptable. For polished user-facing content from an agent or integration, prefer structured HTML because it preserves editor blocks, links, and layout more predictably.

Use only the nodes and marks documented below for this field. Supported editor features differ by endpoint and field. Choose formatting for readability, not decoration: use headings for real sections, paragraphs for narrative text, lists or tables for structured facts, blockquotes for quoted context, callouts for important outcomes/risks/notes when supported, and explicit anchors for links. Do not rely on bare URLs or Markdown links when the link must be clickable; use explicit anchors such as <a href="https://example.com" target="_blank" rel="noopener noreferrer nofollow">link text</a>.

In HTML you can use:

Node Types and Marks

Nodes

paragraph Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Default paragraph. extraPlaceholder is an internal structure for the editor to show a ghost placeholder in empty “template” lines (ProseMirror JSON fragment or null). For normal agent output leave extraPlaceholder as null. Only set it if you are intentionally mirroring a field placeholder the user already has in the open editor; do not set random placeholder data for free-form answers. Atts:

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

invoiceNumber, projectName, projectShortName, clientCompanyName, contactPerson, invoiceNetto, invoiceTotal, fullTotal, accountNumber, dueDate, invoiceDate, reminderPenalty, interestPercent, senderNameAndPosition, senderName, senderPosition, overdueInterestPercent, overdueInterestDays, todayDate, dearCustomer, signature

Example HTML: INV-2024-001, ACME Corp

firstReminderFooterobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

firstReminderGreetingobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

invoiceFooterobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

invoiceGreetingobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

invoiceReminderFeeWarningobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

secondReminderFooterobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

secondReminderGreetingobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

withBestRegardsobject | null

Accepts Markdown or HTML for complex formatting. This content is rendered by the Leadtime rich editor, not by a plain Markdown viewer.

In HTML you can use:

Node Types and Marks

Nodes

extraPlaceholder: null

<p class="paragraph-base" extraplaceholder="null/some-value"></p>

heading Type: block Content: inline* (inline only — do not use block tags such as inside; use e.g. , , , …) Atts:

level: 1

<h1 class="heading-base"></h1>

bulletList Type: block list Content: listItem+ Atts: none

<ul class="list-base"><li></li></ul>

hardBreak Type: inline Atts: none

<br>

horizontalRule Type: block Atts: none

<hr class="hr-base">

orderedList Type: block list Content: listItem+ Atts:

start: 1
type: null

<ol class="order-list-base" type="null/some-value"><li></li></ol>

listItem Content: (paragraph|list)* (paragraphs and/or lists, in any order) Atts: none

<li></li>

blockquote Type: block Content: block+ (one or more block child nodes (e.g. paragraph, list, …)) Atts: none

<blockquote class="blockquote-base"><p class="paragraph-base"></p></blockquote>

variable Type: inline Document/template variable token (span with data-type="variable" and data-id).

id: Variable key, often scoped (e.g. currentUser.firstName, project.name). Only use keys that exist for the document type you are in; product docs list the allowed variable ids. Do not invent new variable names in HTML for production templates. Atts:
id: null

<span data-type="variable" data-id="null/some-value" id="null/some-value"></span>

Marks

link Atts:

href: null
target: _blank
rel: noopener noreferrer nofollow
class: null
title: null

<a target="_blank" rel="noopener noreferrer nofollow" href="">link text example</a>

bold Atts: none

<strong>bold text example</strong>

code Atts: none

<code>code text example</code>

italic Atts: none

<em>italic text example</em>

strike Atts: none

<s>strike text example</s>

underline Atts: none

<u>underline text example</u>

Available Template Variables

You can use the following variables in your invoice text templates. Variables are represented as HTML spans:

Example HTML: INV-2024-001, ACME Corp

enableInvoiceInterestobject | null

Enable invoice interest (null = use default)

enableInvoiceReminderFeeobject | null

Enable invoice reminder fee (null = use default)

invoiceDueDaysobject | null

Number of days until invoice is due (1-120)

invoiceInterestobject | null

Invoice interest rate percentage (0-1000)

invoiceLanguageobject | null

Invoice language code

invoiceReminderFeeobject | null

Invoice reminder fee amount (0-1000)

Responses

200

Invoice settings updated successfully

baseInvoiceInterestobject | nullrequired

Base invoice interest

customTextsobjectrequired

Custom invoice text templates (returned as HTML)

Show properties

cancelationBodystring | null

firstReminderFooterstring | null

firstReminderGreetingstring | null

invoiceFooterstring | null

invoiceGreetingstring | null

invoiceReminderFeeWarningstring | null

secondReminderFooterstring | null

secondReminderGreetingstring | null

withBestRegardsstring | null

enableInvoiceInterestobject | nullrequired

Enable invoice interest

enableInvoiceReminderFeeobject | nullrequired

Enable invoice reminder fee

idstringrequired

Invoice ID

invoiceInterestobject | nullrequired

Invoice interest

invoiceLanguageobject | nullrequired

Invoice language

invoiceReminderFeeobject | nullrequired

Invoice reminder fee

parentSettingsobjectrequired

Parent settings (from organization or workspace)

400

Invalid request data or validation errors

401

Unauthorized - Invalid or missing authentication token

403

Forbidden - Insufficient API scopes or permissions

404

Invoice not found

Try it

Server

Base URLCustom base URLOverrides the selected server when set.

Authorization

OAuth2 access tokenRemember on this deviceInclude my values in samples

Parameters

idpath*Invoice ID (UUID)fieldsToReturnqueryComma-separated list of top-level response fields to return. Overrides the endpoint compact default unless responseShape=full is used.responseShapequeryAdvanced override. Omit for the endpoint compact default. Use full only when you need the complete endpoint response, including nested fields that are not selectable with fieldsToReturn.LT-Response-ShapeheaderAdvanced override. Set to full only when you need the complete endpoint response, including nested fields that are not selectable with fieldsToReturn.

Bodyapplication/json

Request body

Request

curl -X PATCH "https://leadtime.app/api/public/billing/invoices/497f6eca-6276-4993-bfeb-53cbbbba6f08/settings" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
  "baseInvoiceInterest": 2.5,
  "customTexts": {
    "cancelationBody": "<p>This invoice has been cancelled</p>",
    "firstReminderFooter": "<p>Please pay within 14 days</p>",
    "firstReminderGreeting": "<p>First reminder for invoice payment</p>",
    "invoiceFooter": "<p>Thank you for your business</p>",
    "invoiceGreeting": "<p>Dear Customer</p>",
    "invoiceReminderFeeWarning": "<p>A reminder fee will be applied if payment is not received</p>",
    "secondReminderFooter": "<p>Final notice before legal action</p>",
    "secondReminderGreeting": "<p>Second reminder for invoice payment</p>",
    "withBestRegards": "<p>Best regards,<br>Your Team</p>"
  },
  "enableInvoiceInterest": true,
  "enableInvoiceReminderFee": true,
  "invoiceDueDays": 30,
  "invoiceInterest": 8,
  "invoiceLanguage": "en",
  "invoiceReminderFee": 5.5
}'

const response = await fetch("https://leadtime.app/api/public/billing/invoices/497f6eca-6276-4993-bfeb-53cbbbba6f08/settings", {
  method: "PATCH",
  headers: {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN",
    "Content-Type": "application/json"
  },
  body: "{\n  \"baseInvoiceInterest\": 2.5,\n  \"customTexts\": {\n    \"cancelationBody\": \"<p>This invoice has been cancelled</p>\",\n    \"firstReminderFooter\": \"<p>Please pay within 14 days</p>\",\n    \"firstReminderGreeting\": \"<p>First reminder for invoice payment</p>\",\n    \"invoiceFooter\": \"<p>Thank you for your business</p>\",\n    \"invoiceGreeting\": \"<p>Dear Customer</p>\",\n    \"invoiceReminderFeeWarning\": \"<p>A reminder fee will be applied if payment is not received</p>\",\n    \"secondReminderFooter\": \"<p>Final notice before legal action</p>\",\n    \"secondReminderGreeting\": \"<p>Second reminder for invoice payment</p>\",\n    \"withBestRegards\": \"<p>Best regards,<br>Your Team</p>\"\n  },\n  \"enableInvoiceInterest\": true,\n  \"enableInvoiceReminderFee\": true,\n  \"invoiceDueDays\": 30,\n  \"invoiceInterest\": 8,\n  \"invoiceLanguage\": \"en\",\n  \"invoiceReminderFee\": 5.5\n}"
});

import requests

response = requests.patch(
    "https://leadtime.app/api/public/billing/invoices/497f6eca-6276-4993-bfeb-53cbbbba6f08/settings",
    headers={
        "Authorization": "Bearer YOUR_ACCESS_TOKEN",
        "Content-Type": "application/json"
    },
    data="{\n  \"baseInvoiceInterest\": 2.5,\n  \"customTexts\": {\n    \"cancelationBody\": \"<p>This invoice has been cancelled</p>\",\n    \"firstReminderFooter\": \"<p>Please pay within 14 days</p>\",\n    \"firstReminderGreeting\": \"<p>First reminder for invoice payment</p>\",\n    \"invoiceFooter\": \"<p>Thank you for your business</p>\",\n    \"invoiceGreeting\": \"<p>Dear Customer</p>\",\n    \"invoiceReminderFeeWarning\": \"<p>A reminder fee will be applied if payment is not received</p>\",\n    \"secondReminderFooter\": \"<p>Final notice before legal action</p>\",\n    \"secondReminderGreeting\": \"<p>Second reminder for invoice payment</p>\",\n    \"withBestRegards\": \"<p>Best regards,<br>Your Team</p>\"\n  },\n  \"enableInvoiceInterest\": true,\n  \"enableInvoiceReminderFee\": true,\n  \"invoiceDueDays\": 30,\n  \"invoiceInterest\": 8,\n  \"invoiceLanguage\": \"en\",\n  \"invoiceReminderFee\": 5.5\n}",
)

Response

{
  "baseInvoiceInterest": 2.5,
  "customTexts": {
    "cancelationBody": "string",
    "firstReminderFooter": "string",
    "firstReminderGreeting": "string",
    "invoiceFooter": "string",
    "invoiceGreeting": "string",
    "invoiceReminderFeeWarning": "string",
    "secondReminderFooter": "string",
    "secondReminderGreeting": "string",
    "withBestRegards": "string"
  },
  "enableInvoiceInterest": true,
  "enableInvoiceReminderFee": true,
  "id": "uuid-123",
  "invoiceInterest": 8,
  "invoiceLanguage": "en",
  "invoiceReminderFee": 5.5,
  "parentSettings": {
    "baseInvoiceInterest": 2.5,
    "enableInvoiceInterest": true,
    "enableInvoiceReminderFee": true,
    "invoiceInterest": 8,
    "invoiceLanguage": "en",
    "invoiceReminderFee": 5.5
  }
}