ZIMRA fiscal number vs your own invoice number — what's the difference?

Two numbers appear on a fiscal document and they are not the same thing.

Your invoice number

This is the reference from your own system or sequence (for example INV-0184). It helps you and the customer track the sale internally. You control its format.

The ZIMRA fiscal number

This is assigned by the fiscal engine when the document is signed and accepted. It is unique, sequential per device, and is the number ZIMRA and the verification portal recognise. It cannot be changed or reused.

Why it matters

• Credit and debit notes must reference the fiscal number of the original.
• If you see a sequence error, it's about the fiscal counter, not your own numbering — see Troubleshooting.
• Keep both numbers on the document so your records and ZIMRA's line up.