Connect existing systems

Which POS data should you map before Fawtara integration?

Turn a till transaction into a traceable invoice field map without assuming a draft is the final rulebook.

Reviewed by the EazSell editorial team · 22 September 2026

Direct answer

Start with seller and buyer identity, invoice reference and date, line descriptions, quantities, amounts, tax treatment and totals. Map each value to its source system, owner and validation rule, then compare with the current PINT OM specification and your accredited provider's interface. OTA notes that some shared mapping material was circulated as a draft, so track the version used.

Reference: Oman Tax Authority: service-provider FAQs

The short version

Give each target field a source and owner.
Keep examples for taxable and other relevant supplies.
Version the mapping as official rules change.

Find missing data before coding

Retail POS data is often strong on products and payments but weak on customer identity or tax classification. Use real anonymised sales to find gaps. Decide where the missing field should be entered and who may correct it.

Include response fields

A field map is incomplete if it only describes outbound data. Include provider document ID, status, rejection reason and correction reference. Finance needs those values to explain why an invoice is absent from an accepted-document report.

What to check in your own setup

Map source, transformation and owner for each field.
Test representative B2B and B2C records.
Record draft or final specification version and provider rules.

Questions people ask

Can a single example invoice prove the map is complete?

No. Test transaction types, tax treatments and corrections that the business actually uses.

Sources and verification

OTA and OpenPeppol material can change. Check the latest official version before making a tax or deployment decision.

Need to test this against your own checkout?

Tell us which POS or ERP you use, how many locations you run and who handles invoicing today. We can discuss the POS side and identify what needs confirmation with an accredited provider.

Discuss an Oman project