Guide
How to Approve a New Vendor
By Keelstar Team · Updated July 11, 2026
The short answer
New vendor approval should follow a defined path: business sponsor request, duplicate vendor check, risk tier assignment, document collection, functional review (tax, insurance, legal), and final approver sign-off before ERP setup. Each step records who approved, when, and on what basis. Do not create vendor master records in the ERP until the packet is approved — premature setup is how duplicate vendors and payment-before-compliance happen. High-spend or high-risk vendors need additional approvers; low-tier vendors can use streamlined paths but never skip tax validation. Publish SLA targets so sponsors know how long approval takes and what they must provide upfront.
Intake: what sponsors must provide
Require legal name, proposed spend, category, business justification, and contract draft before work begins. Incomplete intake returns to sponsor — not forwarded to AP as an emergency.
Duplicate and conflict checks
Search ERP and pending requests for similar names, TINs, and addresses. Duplicate vendors fracture spend analytics and duplicate W-9 maintenance. Resolve merges before approval.
Parallel vs sequential reviews
Tax, insurance, and legal can review in parallel once documents arrive. Final approval stays sequential after all functional gates pass. Parallel review cuts cycle time without skipping steps.
Document the approval record
Store approver name, role, timestamp, and packet version approved. Auditors ask whether payment occurred before approval — your record should answer definitively.
ERP activation timing
Create or activate the vendor master only after approval. Configure payment holds in AP until first-invoice validation confirms nothing changed post-approval.
Emergency and exception paths
Define a narrow exception process for true emergencies — with retroactive deadline, executive approval, and automatic payment hold until packet completion. Undocumented exceptions become the norm.
Frequently asked questions
- Who should be the final approver for a new vendor?
- Typically procurement or vendor management for commercial vendors, with finance concurrence for banking changes. Legal approves when contract terms are non-standard. Define thresholds in your approval matrix.
- Can a buyer approve their own vendor?
- Avoid self-approval for vendors the requester will benefit from personally or departmentally. Segregation of duties reduces fraud and preferred-vendor bypass of competitive sourcing.
- What triggers rejection at approval?
- TIN mismatch, inadequate insurance, failed exclusion screening, unsigned contract, or incomplete banking verification. Rejection should specify remedial action — not a generic 'denied.'
- How fast should new vendor approval take?
- Tier 3 vendors: five to ten business days with complete submissions. Tier 1 with legal review: two to four weeks. Publish SLAs and track actual cycle time monthly.
Related guides
Put this into a monitored workflow
Vendor Packet handles this continuously — with reminders and an audit trail.