How to Check a Supplier Before Claiming Input Tax: FBR Invoice, ATL & Registration Checks (2026)

Pakistan's Digital Invoicing regime is a clearance model: FBR stamps each invoice in real time and returns a unique FBR invoice number (IRN) and Version 2.0 QR code before the buyer receives it. That design moves compliance risk onto the buyer — a registered buyer's input-tax adjustment depends on the purchase invoice actually existing in FBR's system, and an invoice issued outside Digital Invoicing by a notified supplier carries no IRN, cannot be verified, and gives no adjustment.

Finance Act 2026 raised the stakes further: input tax claimed against fictitious or simulated suppliers is denied, fake and flying invoices attract penalties linked to the invoice value, and FBR maintains a register of simulated invoice issuers. In practice this means a buyer who never checks suppliers can lose input tax months later — during return processing or audit — for a purchase that looked perfectly normal at the time.

Check 1 — verify the invoice itself. Every genuine FBR digital invoice prints the FBR invoice number and a 1.0 × 1.0 inch QR code. Scan the QR with FBR's Tax Asaan app, or SMS the invoice number to 9966, or use FBR's online verification page. If the number does not verify, the invoice was never posted — do not book input tax against it. Check 2 — verify the supplier's status. Confirm the supplier appears as sales-tax registered and active: FBR's verification services report Registered/Unregistered and Active/In-Active status, and ATL (Active Taxpayer List) status can be checked on fbr.gov.pk or by SMS. A supplier who has dropped to in-active status is an input-tax and withholding risk.

Check 3 — match the identity. The seller NTN (7 digits) or CNIC (13 digits) printed on the verified invoice must belong to the party you are actually paying — a verified invoice in someone else's name is exactly how flying-invoice schemes work. Check 4 — pay through the bank. Under Section 73 of the Sales Tax Act, payments above Rs 50,000 must move through banking channels within the prescribed time to keep the input tax claim safe; cash settlement of large purchase invoices breaks the claim even when the invoice itself is genuine.

Treat these as stop signs: an invoice with no QR code or FBR invoice number from a supplier who is required to be integrated; an invoice number that fails SMS 9966 or Tax Asaan verification; a supplier who is sales-tax registered on paper but missing from the ATL; a manual or handwritten invoice from a business category already covered by the Digital Invoicing schedule; and pricing that only makes sense if the sales tax shown is never actually being paid — the classic economics of a flying invoice.

Pressure to pay in cash, reluctance to share an NTN, or a seller whose invoice shows a different business name than the bank account receiving payment complete the list. None of these alone proves fraud, but each one shifts the input-tax risk onto you, and together they are the standard pattern FBR's cross-matching is built to catch.

The cheap time to verify is before payment, not on the 18th of the month when the return is due. A workable routine: verify the QR or invoice number on receipt of every sizeable purchase invoice, refresh the ATL status of your vendor list monthly, and file the verification evidence (screenshot or SMS reply) with the invoice in the same folder as your six-year sales tax records. Your claimed purchases are cross-matched against what suppliers declare in their own returns, so a supplier who never files will eventually surface — better to catch them at onboarding.

On the selling side, the same logic is why integrated suppliers win business: a buyer can verify a Digi Invoice-posted invoice in seconds, because every invoice goes to FBR in real time and prints with its IRN and QR code automatically. If your customers are starting to run these checks on you, being verifiably integrated is now part of being a credible vendor.