Object that contains information on the cardholder's billing address. When supplied in the request the address is used; when omitted it is retrieved in full from the Thredd database. The two sources are never mixed. For Visa both a country code and a postal code are required (from whichever source is used). In addition to the characters rejected in all fields, billing address fields also reject the @ character. A billing address retrieved from the Thredd database is subject to the same character validation (a field containing a disallowed character returns 400), while any field exceeding its maximum length is trimmed to that length rather than rejected.