| Field | Type | Description |
|---|---|---|
| external_id (required) | string | The merchant's unique ID for the customer. Max. length: 255 characters |
| first_name | string | The first name of the customer who made the checkout. Max. length: 255 characters |
| last_name | string | The last name of the customer who made the checkout. Max. length: 255 characters |
| string | The email address of the customer who made the checkout. Max. length: 255 characters | |
| phone_number | string | The phone number of the customer who made the checkout. Max. length: 255 characters |
| accepts_sms_marketing | boolean | A flag indicating whether the customer chose to accept SMS marketing messaging. Please note that whether or not the customer is ultimately subscribed to messaging may be determined by additional factors. |
| accepts_email_marketing | boolean | A flag indicating whether the customer chose to accept email marketing messaging. Please note that whether or not the customer is ultimately subscribed to messaging may be determined by additional factors. |