Ramp: Manage vendors

Manage your vendors' documents and onboarding materials: upload vendor documents such as W-9/W-8 tax forms, contracts, COIs, payment instructions, and onboarding paperwork, then check bulk upload OCR and matching status. Use when: 'upload a W9', 'attach a vendor contract', 'bulk upload supplier docs', 'check vendor document status', 'upload a COI for a vendor'. Do NOT use for card transaction receipts or bill invoice attachments (use ramp-manage-bills).