Merchant address post code or zip code for the specified address category. There is no pattern defined for this field. UTF8 characters (extended ASCII characters) are supported for this field. Maximum length of this field is defined in bytes and special character of any extended ASCII character can be more than 1 byte for each character. Consumer should consider number of bytes for maximum length determination. For example, if consume wants to provide three 2-bytes ASCII character, then actual length of the provided data is 6, not 3.