Version 0.5 of the Merchant Integration Guide has been posted. Here are the changes made so far in 0.4 and 0.5. Download it in the developer section of this site. 0.4 – Added documentation on generating the token. Also added sample php code for getting the 7-Pay Reference. 0.5 – Added 3 new optional fields (transactionDescription – will be shown in the customer LCD screen and payment instruction page, receiptRemarks that is printed in the receipt, and email for notifying customers of 7-Pay transactions.