The expense object

You can expect the below object when you register a webhook for the following events:

expense.create: an expense is created from a card transaction.
expense.update: an expense's status changes (for example incomplete to pending_review). A new expense that moves straight to pending_review sends expense.update right after expense.create.

Mamo sends these events only when your business requires at least one expense detail (category, description or receipt) in its expense settings; otherwise no expense webhooks are sent.

Raw sample

{
  "status": "incomplete",
  "description": null,
  "invoice_number": null,
  "id": "EXP-3C4D5E6F7A",
  "transaction": {
    "amount": 100.0,
    "amount_currency": "AED",
    "billing_amount": 100.0,
    "billing_amount_currency": "AED"
  },
  "card": {
    "identifier": "CRD-1A2B3C4D5E",
    "name": "Team travel card",
    "last4": "1234"
  },
  "user": {
    "identifier": "MBOWNR-1A2B3C4D5E",
    "fullname": "Jane Doe",
    "email": "[email protected]"
  },
  "category": null,
  "tax_code": null,
  "payment_account": null,
  "expense_account": null,
  "vendor": null,
  "receipt_uploaded": false,
  "created_at": "18 Dec 2025, 11:24 AM",
  "updated_at": "18 Dec 2025, 11:24 AM",
  "event_type": "expense.create"
}

Field descriptions

Field	Type	Description
status	String	Expense status (`incomplete`-`pending_review`-`ready`-`synced`)
description	String	Expense description
invoice_number	String	Invoice number
id	String	Expense ID
transaction	Object	Transaction details containing amount and currency information
transaction.amount	Number	Transaction amount
transaction.amount_currency	String	Transaction currency code
transaction.billing_amount	Number	Billing amount
transaction.billing_amount_currency	String	Billing currency code
card	Object	The card used
card.identifier	String	Card ID
card.name	String	Card name/label
card.last4	String	Last 4 digits of the card
user	Object	The user the expense belongs to
user.identifier	String	User ID
user.fullname	String	User's full name
user.email	String	User's email
category	String	Expense category
tax_code	String	Tax code
payment_account	String	Payment account
expense_account	String	Expense account
vendor	String	Vendor information
receipt_uploaded	Boolean	Whether receipt is uploaded
created_at	String	Date of the card transaction the expense was created from (Dubai time), format `DD Mon YYYY, hh:mm AM`
updated_at	String	Expense last update date
event_type	String	`expense.create` or `expense.update`