/v2/w9

Add W9 or Modify Existing W9

A new W9 will require the following fields:

• First & Last Name
• Address, City, State, Zip Code
• Business / Personal indicator (business_personal)
• TIN Type and TIN (EIN or SSN)
• Signature

Business entities (business_personal = 'B') require the following:

• Business Name
• Tax Classification