• identity_verification:
  identity verification document

• address_verification:
  address verification document

• date_of_birth_verification:
  date of birth verification document

• tax_id_verification:
  tax ID verification document

• account_approval_letter:
  407 approval letter

• cip_result:
  initial CIP result

• w8ben:
  W-8 BEN tax form

• w9:
  W9 tax form

• limited_trading_authorization:

The specific type of document, e.g. passport

Base64 string representing the document

This field is Required if content is specified. ENUM: application/pdf, image/png, or image/jpeg. If document_type is w8ben then application/json is also accepted