Recent Revisions to This Document Release Changes July 2019 Added information about multibyte character strings. See Working with Mutltibyte Character Strings. March 2019 This revision contains only editorial changes and no technical updates. March 2017 Removed the “Merchant Notifications” section. Removed the link to the New Business Center User Guide. May 2015 Updated the link to the New Business Center User Guide. See Supported Payment Types. October 2015 Added the “Merchant Notifications” section. See Supported Payment Types. September 2015 Added the “Supported Payment Types” section. See Supported Payment Types. Added an Important note regarding the ap_payment_type request field to the following sections: ■ Initiating a Payment. ■ Checking Payment Status. ■ Refunding a Payment. Added the mobile payment value ADM to the ap_payment_type request field. See ap_payment_type. Added the Mobile Payment examples: ■ Initiate Payment Request. ■ Check Status Request. ■ Refund Request. March 2015 Updated the “Simulating Response Messages” section. See Simulating Response Messages.