National address and buyer ID: invoice data mistakes

Some invoice mistakes have nothing to do with tax or signatures: a misspelt city, a missing postal code, a truncated buyer ID number. Yet the Zakat, Tax and Customs Authority names them explicitly among the common mistakes: verify the city and postal code accurately for both the supplier and the buyer, and make sure the buyer's identifier is entered correctly and completely. This data is what ties the invoice to its two parties, and getting it wrong makes the invoice weak evidence for both.

The seller's national address

The seller's address on the invoice is the registered national address, complete:

• street name, district and city;
• building number: exactly four digits (BR-KSA-37);
• postal code: exactly five digits (BR-KSA-66).

A full national address with district and street is required by rule BR-KSA-09. The easiest way to avoid mistakes: copy the address from the national address certificate exactly, don't type it from memory, and don't let the numeric fields accept free text.

The buyer's address

• A tax invoice carries the buyer's postal address (BR-KSA-10).
• If the buyer is in the Kingdom, their address is a national address with the same elements: street, building number, postal code, city and district (BR-KSA-63).
• If they are abroad, their full address in their own country with the right country code — a Saudi address on an export invoice is a contradiction.
• A simplified invoice to a consumer does not require the buyer's address.

Most mistakes here come from customer data entered once at the first sale and never reviewed. The city is written in different ways, and the postal code is left blank "for now" and stays that way.

The buyer's identifier

The VAT number

If the buyer is registered for VAT, their VAT number on the tax invoice is 15 digits beginning and ending with 3 (BR-KSA-44). A truncated or mistyped number fails the invoice.

Other identifiers

If the buyer has no VAT number, another identifier is given from the list the standard defines (BR-KSA-14):

A tax invoice that carries neither a VAT number nor another identifier for the buyer is incomplete (BR-KSA-81). In two cases one identifier becomes mandatory: private healthcare and private education to a citizen at the zero rate accept only the buyer's national ID (BR-KSA-49) — see VAT category and exemption reason codes.

Common identifier mistakes

• The wrong identifier type: an iqama number entered as a national ID, or a commercial registration entered as a VAT number.
• A number missing a digit, or carrying spaces and dashes copied from a document.

Check at entry, not at submission

An address or identifier mistake is cheapest to catch when the customer's details are saved, not when the Authority rejects their invoice. Check the format at the moment of entry: the number of digits, the first digit, and the identifier type that fits the customer. And review your larger customers' details periodically. Other data-related rejection rules are collected in the most common Fatoora rejection errors and ZATCA invoice rejection errors and how to prevent them.

How this looks in alFatora

In the alFatora app:

• Your business address is checked before the first invoice: a four-digit building number and five-digit postal code on the company profile, and street, city and building number required before any invoice is issued.
• Every buyer identifier with its shape: all eleven identifier types are listed, each checked against its format — national ID starts with 1, iqama with 2, unified number with 7, commercial registration ten digits.
• The same check in two places: when you save the customer's details, and again when the invoice is validated, so an identifier that saves is one an invoice accepts.
• A warning before issue when a tax invoice has neither a VAT number nor another identifier for the buyer, or lacks national address elements for a buyer in the Kingdom.
• Education and healthcare to a citizen do not pass without the national ID.

Through alFatora Connect, the same rules run on every document your system sends.