How are supplier and customer master data used in e-invoicing in the UAE?

Supplier and customer master data help identify the parties to a transaction and populate the required fields in an e-invoice. This may include legal names, addresses, tax registration details where applicable, identifiers, and other information required for the transaction. Accurate master data helps the invoice pass validation and reach the correct buyer.

During the transition, not every business or customer may be onboarded at the same time. The UAE Ministry of Finance guidance recognises the need to ensure that sufficient buyer and supplier data is available during this period. Businesses should therefore agree with their service provider how to handle transactions involving parties that have not yet joined the system.

Review customer and supplier records before integration testing. Standardise naming and address formats, verify tax registration details, identify duplicate records, and assign responsibility for updates. A technically sound integration can still fail or create downstream reconciliation issues if the underlying data is incomplete or inconsistent.

Key points

• Check required fields: Identify the master-data fields required for each transaction type.
• Validate important identifiers: Review legal names, addresses, tax registration details, and buyer or supplier identifiers.
• Clean duplicate and incomplete records: Resolve inconsistencies before testing begins.
• Plan for non-onboarded counterparties: Confirm the permitted process with your Accredited Service Provider and current guidance.
• Assign data ownership: Make it clear who maintains supplier and customer records and approves changes.