Accounts payable is often introduced as a basic concept in accounting: a current liability representing amounts owed to suppliers. That definition is correct, but it is incomplete in the way most finance teams experience AP.
Vendor onboarding can look simple until it becomes urgent, and vendor onboarding for accounts payable is often where long-term issues begin. Someone needs a new supplier today, details arrive via email and PDFs, and accounts payable is expected to set the record up fast, with no mistakes. In many organisations, that leads to duplicate vendor records, invoices stuck in exceptions, payment reissues, and controls that are hard to defend when an audit asks, show me how this was approved.
Many organisations use supplier onboarding to mean finance setup: collecting payment details, creating a record in the ERP, and confirming invoice requirements. Those steps matter, but supplier onboarding for procurement goes further, addressing the operational readiness needed to avoid recurring procurement pain points.