Update details about an existing vendor.

Requirements for enabling vendor payments

Vendor address details are required for paying a vendor by check or for inviting the vendor to join the BILL network.

• line1
• city
• stateOrProvince
• zipOrPostalCode
• country
• payeeName

Address state/province rules for international vendors

The address.stateOrProvince field enforces strict validation for the US,
Canada, and Australia:

• United States (US): 2-character state code (for example, CA, NY).
• Canada (CA): 2-character province code (for example, AB, BC, ON).
• Australia (AU): 2 or 3-character state code (for example,
  WA, NT, ACT, NSW, QLD).
• All other countries: Free text. Enter the full state or province
  name (for example, Île-de-France or Bavaria).

Sending a full state or province name for US, Canadian, or Australian addresses returns a 400 Bad Request error. See International vendor in the Guides section for more information.

Note: You cannot add or update vendor bank account information with this endpoint. You can add and manage vendor bank account information with a dedicated set of endpoints.

• Create a vendor bank account: POST /v3/vendors/{vendorId}/bank-account
• Get vendor bank account details: GET /v3/vendors/{vendorId}/bank-account
• Delete a vendor bank account: DELETE /v3/vendors/{vendorId}/bank-account