Recent Revisions to This Document Release Changes August 2019 Added information about multibyte character strings. See Working with Multibyte Character Strings. March 2019 Added the following request fields. See Initiating a Payment, and Working with Multibyte Character Strings. ■ invoiceHeader_submerchantID ■ invoiceHeader_submerchantName ■ item_#_productSKU ■ item_#_quantity ■ item_#_unitPrice Updated initiate payment request examples. See Initiate Payment Examples. January 2018 Updated the “Supported Currencies and Amounts” section. See Supported Currencies and Amounts. 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 apPaymentType request field to the following sections: ■ Initiating a Payment. ■ Checking Payment Status. ■ Refunding a Payment. Added the mobile payment value AYM to the apPaymentType request field. See apPaymentType. Added the “Mobile Payment” XML examples: ■ Initiate Mobile Payment Request. ■ Check Mobile Payment Status Request. ■ Refund Request. Added the “Mobile Payment” Name-Value Pair examples: ■ Initiate Payment Request. ■ Check Status Request. ■ Refund Request.