Invoice interface

The EDI invoice interface enables you to submit invoices to Unite automatically, directly from your system. This reduces manual effort and saves time, costs, and resources.

Explanation of transmitted information

Note: All invoice documents must comply with the legal requirements of the tax authorities.

Please provide the following data:

Information on header level

All fields below are mandatory.

Description	openTRANS segment	Specifications
Invoice number	INVOICE_ID	Unique document number for each invoice.
Invoice date	INVOICE_DATE	Date the invoice was created or issued.
Date of service/delivery	DELIVERY_DATE	e.g. shipment date of goods.
Buyer address	BUYER_PARTY	Address of the ordering Unite entity.
Supplier address	SUPPLIER_PARTY	Address of your legal entity issuing the invoice or dispatching the goods. Must include VAT ID.
Unite supplier number	SUPPLIER_PARTY/PARTY_ID (type="buyer_specific")	As specified in the order.
Invoice recipient	INVOICE_PARTY	Address of the Unite entity that will settle the invoice. Corresponds to the client. Must include VAT ID.
Currency	PRICE_CURRENCY

Information on item level (line level)

All fields are mandatory unless otherwise noted.

Description	openTRANS segment	Specifications
Item number	SUPPLIER_AID	Item number from your submitted catalogue.
Invoiced quantity	QUANTITY
Order unit	ORDER_UNIT
Unite price	PRICE_AMOUNT	Net unit price of the item based on the price quantity (see PRICE_QUANTITY).
Total price	PRICE_LINE_AMOUNT	Net total price for the item line (PRICE_LINE_AMOUNT = PRICE_AMOUNT × QUANTITY ÷ PRICE_QUANTITY).
Price quantity	PRICE_QUANTITY	Quantity on which the unit price (PRICE_AMOUNT) is based.
VAT rate	TAX	e.g. 0.19 for 19% VAT.
Date of service/delivery	DELIVERY_DATE	Date of service at item level (if different from header level).
Order number	ORDER_REFERENCE/ORDER_ID	Order number for referencing the purchase order.
Line item number	ORDER_REFERENCE/LINE_ITEM_ID	Line item number for referencing the purchase order.
Remark – used for serial numbers	REMARK	Transmitted via special syntax in REMARK field. Find further information on serial numbers on this page and in the sample file below.

Supported formats and transport protocols

Unite relies on the proven openTRANS data format to process invoices automatically and reliably. The Unite standard is based on openTRANS 1.0 (INVOICE).

Further supported formats and transport protocols are listed on the EDI interface overview page.

Sample invoice file

Below you’ll find a commented example file and specifications, including an EDIFACT guideline:

supplier_invoice.zip zip - 7.07 MB 2025-07-16