First name of customer, used when creating a new customer.

Last name of customer, used when creating a new customer.

Email for customer. Used for matching on existing customers. Request must include an email and/or a phone.

Cell phone for customer. Used for matching on existing customers. Request must include an email and/or a phone.

External identifier for customer. Expected to be a unique identifier from the API consumer's system. Matching on external identifier takes precendence over email and phone matches.