`IdentifyingInformation`

Government-issued IDs and tax identifiers. Used on individual customers, business customers, and each AssociatedPerson on a business.

Field	Type	Required	Notes
`type`	enum: `drivers_license`, `national_id`, `passport`, + 60+ tax-id types (`ssn`, `itin`, `nino`, `rfc`, …)	yes	Government IDs and tax identifiers share this array.
`issuing_country`	string (ISO 3166-1 alpha-3)	yes
`number`	string	conditional	Required for government IDs. Optional for some tax-id types.
`description`	string	conditional	Required when `type === "other"`.
`expiration`	string (`YYYY-MM-DD`)	no
`image_front`	string (base64 data-uri)	no	Min 200×200px, max 15 MB (combined with back: 24 MB).
`image_back`	string (base64 data-uri)	no

Example: US SSN

{
  "type": "ssn",
  "issuing_country": "USA",
  "number": "111-22-3333"
}

Example: passport with image

{
  "type": "passport",
  "issuing_country": "USA",
  "number": "A12345678",
  "expiration": "2032-06-01",
  "image_front": "data:image/jpeg;base64,…"
}