Vendor Onboarding Best Practices: A Checklist for SMEs

Grace Achieng
By Grace Achieng

Head of Finance Solutions

20263 min read
Vendor Onboarding Best Practices: A Checklist for SMEs

TL;DR

Vendor onboarding is the formal process of setting up a new supplier so they're ready to receive orders and payments safely. A good onboarding captures banking and tax details, terms, and contacts once — and approves the vendor before any purchase order is issued.

Why onboarding matters more than you think

Rushed onboarding creates duplicate vendors, payments to wrong accounts, and suppliers nobody remembers approving. The onboarding step is where procurement controls are won or lost.

The vendor onboarding checklist

Capture everything needed to order and pay in one structured record, and require an approval before the vendor goes live.

  • Legal name and registration/tax identification.
  • Primary and finance contacts with roles.
  • Banking details, verified (this is the fraud risk point).
  • Payment terms and currency.
  • Product catalogue or service list with prices.
  • Delivery lead times and minimum order quantities.
  • Approval by an authorised person before first PO.

Verify banking details before payment

Vendor fraud — fake bank detail changes — is one of the most common SME losses. Confirm banking details with a call or a second source at onboarding, and require re-verification when a vendor asks to change their bank details.

From onboarding to daily ordering

Once approved, the vendor appears in your supplier list and purchase orders flow against their record. Order history builds up automatically, giving you the data for performance reviews and renegotiation.

Frequently asked questions

What is vendor onboarding?

The formal process of capturing a supplier's details and approving them before they can receive orders and payments.

What details should I collect when onboarding a vendor?

Registration/tax info, contacts, verified banking details, payment terms, product catalogue, lead times, and minimum order quantities.

How do I prevent vendor payment fraud?

Verify banking details at onboarding and re-verify any change request through a second channel, like a call to a known contact.

Should I approve vendors before buying from them?

Yes. An approval step before the first purchase order keeps procurement auditable and stops rogue suppliers.

What is a vendor master?

The central list of approved vendors with all their records. Retten Work keeps it structured and searchable.