UpdateBill

Changes a bill that is still a draft, or that the company rejected. A rejected bill goes back to Draft, so you can attach a corrected file with uploadbillfile and submit it again. How keys, responses and statuses work is on Vendor bills.

POST /api/public/updatebill
APIKey: your-api-key
Content-Type: application/json

{
  "BillID": 109827,
  "BillNumber": "INV-2026-0042",
  "BillDate": "2026-10-20",
  "CurrCode": "USD",
  "Amount": 900.00,
  "Tax": 100.00
}

Send every field, as in createbill, plus BillID: the request replaces the bill’s number, date, currency, amount and tax. The bill’s files stay.

Rules

The rules of createbill apply, and also:

Rule	`Info` when it fails
The bill belongs to the key’s supplier and company.	`BillID is required`, `Bill not found`
The bill is a draft, or was rejected.	`This bill can no longer be modified`

Response

On success, Identity is the bill’s ID and RetInfo is the bill, with the status Draft.