> For the complete documentation index, see [llms.txt](https://docs.zebec.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zebec.io/zebec-silver-card/silver-card-sdk/recipient-fields.md).

# Recipient Fields

To create a valid `Recipient` instance, provide the following details:

* **participantId** (alphanumeric string): Unique identifier for the buyer end user. 1-20 chars.
* **firstName**, **lastName** (string): Participant's full name.
* **emailAddress** (string): Contact email. 1-80 chars
* **mobilePhone** (string): Mobile number with country code.
* **language** (string): Language code (e.g., `"en-US"`).
* **city**, **state**, **postalCode** (string): Location details.
* **countryCode** (CountryCode enum): ISO 3166-1 alpha-3 country code.
* **address1** (string): Street address. (max 50 chars)