Maxim

Maxim

Last updated on Oct 8, 2026

Updates a write-off. Only the fields you pass are changed, the rest stay as they were. See Common Rules for partial editing.

v1/writeoffs/edit.php

Parameters

Field Type Required Description
writeoff_id int Yes Write-off ID
materials array No Materials to write off: id or sku and amount
products array No Products to write off: id or sku and amount
num string No Number
date string No Write-off date, YYYY-MM-DD
materials_storage_id int No Storage location materials are written off from. 0: the default write-off storage location
products_storage_id int No Storage location products are written off from. 0: the default write-off storage location
notes string No Notes

If at least one of the materials and products arrays is passed, the lines are replaced as a whole, and the array that is not passed is treated as empty. If neither is passed, the lines are unchanged. The status is not changed by this method; use v1/writeoffs/update_status.

Example request

{
    "writeoff_id": 19291,
    "materials": [
        {
            "id": 2051,
            "amount": 0.2
        }
    ]
}

In this example only materials is passed, so the product is removed from the write-off.

Example response

{
    "success": true
}

Errors

Error Reason
No writeoff_id in input writeoff_id is missing
Write-off not found or access denied Write-off not found or deleted
No products or materials in input The line arrays were passed but empty
Material with id 2051 not found Material not found or deleted
Amount must be greater than 0 for material with id 2051 Quantity is not a number or not above 0 after rounding
Storage ID not found Storage location not found or deleted
Date is not a valid date in format YYYY-MM-DD Invalid date format

Other line errors are the same as in v1/writeoffs/add.