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Tamem

ZATCA e-invoicing

Every invoice and credit note is built as a ZATCA document when it is issued, chained by hash and carrying its QR.

The tax invoiceWatch the film, 1:22

How it works

  • Built when the sale is made

    At the moment of sale, the invoice is built as a ZATCA UBL 2.1 document, a simplified tax invoice, and given its hash. A sale made offline gets its invoice when the tablet syncs.

  • One unbroken hash chain

    Each document carries the hash of the one before it. The chain is continuous for your whole business, across every branch, invoices and credit notes alike. Changing one would break every hash after it.

  • The QR on each invoice

    Today the QR carries ZATCA’s tags 1 to 5: seller’s name, VAT number, date and time, total and VAT. Once your shop is connected to ZATCA, it carries tags 1 to 9 and the document is signed.

  • Refunds and cancellations

    A refund issues a credit note, and all refunds together can’t exceed the order’s total. Canceling an invoiced order issues one too, and is refused while the customer’s payment is still held.

  • Discounts that add up

    Promotions and loyalty points go on the document as allowances, so its lines add up to its totals.

The rules

Signing and reporting
Not yet. Connecting to ZATCA is not open on Tamem yet, so today no document is signed or reported to ZATCA.
Connecting
When it opens, the owner alone connects from Settings › ZATCA with an OTP from their own Fatoora portal, and renews the same way. Signing and reporting every 10 minutes start then.
Business customers
Once connected, a sale to a business customer issues a standard tax invoice, cleared by ZATCA before it can be shared.
Locked details
While you are connected, your VAT number and legal name can’t be changed.
Not included
Businesses registered for VAT as part of a VAT group.

POS

Sell at the counter, offline too

The receipt is the tax invoice.

Phase 2 is the law for every VAT registered business here. Tamem builds every invoice and credit note as a ZATCA document when it is issued, hash chained and carrying its QR. Signing and reporting start once your shop is connected to ZATCA. Connecting isn’t open yet.

Al Noor Laundry

Simplified tax invoice

INV-2026-004183
26/08/2026 15:26

Thobe, Wash ×2
16.00
Abaya, Dry clean
28.00
Subtotal
44.00
VAT 15%
6.60
Total (⃁)
50.60

Change one invoice. Watch the rest stop matching.

Take ⃁ 10 off invoice 2, or add 10. Every hash from that invoice onward is recomputed live.

  1. INV-2026-00418014:31Intact
    Total96.03
    prev
    5FECyour first invoice ever
    this
    F3AF
  2. INV-2026-00418114:52Intact
    Total
    142.50
    prev
    F3AF
    this
    F6AD
  3. INV-2026-00418215:08Intact
    Total44.00
    prev
    F6AD
    this
    A0F3
  4. INV-2026-004183Next invoice

Nothing here is checking a database. Each invoice carries the hash of the one before it, so an edited invoice changes its own hash and every hash after it. The break starts exactly where the edit did, and no earlier.

Take a real order on it first.

We set it up with your catalog and your prices, on your counter. You watch it print, and decide.

Start free trialBook a demo
Or call+966 53 496 5642WhatsApp+966 53 496 5642