A Supplier Charged Me VAT But There's No TRN on the Invoice — What Do I Do?

Quick answers

What if a supplier charged VAT but there's no TRN on the invoice?

Do not pay the VAT portion until the supplier reissues the invoice with a valid TRN. An invoice that charges 5% VAT without showing the supplier's Tax Registration Number is not a valid tax invoice, and the VAT on it can never be reclaimed.

How do I check a UAE TRN?

A UAE TRN is exactly 15 digits and begins with 1 — in practice it starts 100. Verification is free and instant on the Federal Tax Authority portal at tax.gov.ae.

What is the AED 10,000 rule for supplier invoices?

For a supply above AED 10,000 including VAT, the supplier must issue a full tax invoice, and your own TRN as the buyer must appear on it. For a supply of AED 10,000 or less, a simplified tax invoice is sufficient and your TRN is not required.

Does this matter if I am not VAT registered?

Then none of the recovery mechanics apply to you — you cannot reclaim input VAT at all, so the 5% is simply part of your cost either way. It is still worth checking the TRN.

Is this tax advice?

No. This is general information about supplier tax invoices and TRN checks in the UAE. Confirm your obligations with the Federal Tax Authority or a qualified tax advisor.

Why the TRN is not a formality

Only a VAT-registered business is permitted to charge VAT. The TRN is what proves that registration exists.

Without it on the document, two things are true at once: you have no basis to recover the 5%, and there is a real possibility the supplier was not entitled to charge it in the first place. The money you paid as "VAT" may simply have gone to the supplier.

If the claim is denied at audit, the VAT is not refunded later. It becomes a cost.

How to check a TRN in under a minute

A UAE TRN is exactly 15 digits and begins with 1 — in practice it starts 100. A number with 16 digits, or any other length, is not a valid TRN regardless of what the invoice says.

Verification is free and instant on the Federal Tax Authority portal at tax.gov.ae. Enter the 15 digits and the tool returns the legal name registered against that number.

Check the name, not just the pass or fail. If the invoice is from a trading name and the FTA returns a different legal entity, that can be normal — but if the returned name is unrelated to the supplier, treat the invoice as unverified and ask for a corrected one.

Verify before you book the VAT, not after. A VAT certificate the supplier emails you is a snapshot of a moment in the past. The FTA database is the live position.

Three situations, three responses

• No TRN on the document at all. Do not pay the VAT portion. Ask for a corrected invoice showing the TRN. If the supplier is genuinely registered this takes them minutes.
• A TRN is shown but fails verification. Pause the whole invoice and ask the supplier to check it against their own certificate. Transposed digits are common and innocent. A number that consistently fails is not.
• The supplier admits they are not registered. Then no VAT should have been charged. Ask for the invoice to be reissued without the 5%, at the net amount.

The other reason claims get denied — the AED 10,000 line

Even with a valid supplier TRN, the wrong invoice type will block the claim.

For a supply above AED 10,000 including VAT, the supplier must issue a full tax invoice, and your own TRN as the buyer must appear on it. For a supply of AED 10,000 or less, a simplified tax invoice is sufficient and your TRN is not required.

The trap is suppliers whose systems default to the simplified format for every sale, because they never ask whether the customer is registered. A simplified invoice received for a supply above AED 10,000 is not a valid basis for an input tax claim and should not be processed as one.

If you receive one, ask for a full tax invoice with your name, address and TRN on it.

What to actually send the supplier

Keep it short and unemotional. Something along these lines works:

"Your invoice [number] charges 5% VAT but does not show a TRN. We can't process the VAT without it. Could you reissue the invoice with your TRN included, or reissue it at the net amount if you're not VAT registered?"

Most suppliers fix it the same day. The ones who go quiet are telling you something useful.

If you are not VAT registered yourself

Then none of the recovery mechanics apply to you — you cannot reclaim input VAT at all, so the 5% is simply part of your cost either way.

It is still worth checking the TRN. A supplier charging VAT without being registered is charging you 5% they are not entitled to collect, and that is your money regardless of your own registration status.

Keep the evidence

Store the verification result alongside the invoice for the full record retention period. At audit, "we checked" is worth nothing without the document that shows what the check returned.

Frequently asked questions