Best practice in supplier onboarding is mostly about verification and about capturing the operational details that prevent recurring exceptions. The legal entity, the tax reference, independently verified bank details, the payment terms, the invoicing address and the units of measure they bill in. Every one of these settled at onboarding prevents a stream of problems that would otherwise recur on every invoice.
Verify identity and bank details independently
Confirm the legal entity and the payment details through channels you establish yourself rather than those supplied in the onboarding pack. Onboarding is when a fraudulent payee is easiest to introduce, because there is no history for anything to look inconsistent against.
Separate who requests from who creates
The person requesting a new supplier should not be the person creating the record, and neither should be the person who releases payment runs. This separation is the specific control against an internal supplier billing for services that are never delivered.
Capture the operational details once
Payment terms, the invoicing address you want used, the units of measure they will bill in, and whether prices include delivery and tax. Each prevents a recurring mismatch, and asking at onboarding costs one conversation instead of a permanent exception stream.
Re-verify periodically, not just at the start
Bank details for suppliers you pay infrequently, and legal entities where a group has restructured, both change quietly and both send payments somewhere unintended. A periodic review of supplier records amended since last time, performed by somebody outside payables, catches what onboarding could not have known.
Questions people ask about supplier onboarding best practices
What should be re-verified periodically?
Bank details, particularly for suppliers you pay infrequently, and the legal entity where a group has restructured. Both change quietly and both cause payments to go somewhere unintended.
How do we avoid duplicate supplier records?
Match on tax reference and bank details rather than name, and route anything unrecognised to a person rather than creating a record automatically when an invoice arrives.
Who should own the supplier list?
A small named group, separate from payment release, with new and amended records reviewed periodically by somebody outside the payables process.
Should onboarding require a purchase order threshold conversation?
It helps. Telling a new supplier at the outset which address to invoice, that a purchase order reference is required, and what happens if it is missing, sets the pattern before any invoice arrives and avoids a correction conversation later.