Terms and abbreviations

Authorization	permission of the issuing bank to make the payment via bankcard
Bank card, card	payment card that is connected to one or more current bank accounts
CRE	cash register equipment designed to automate cash transactions, cash accounting, registration of the acquisition of goods and print a cash receipt
FDO	fiscal data operator, legal entity that receives, processes, stores and transfers fiscal data to the Federal Tax Service (FTS) of Russia
Fiscal sales receipt, receipt	document generated by a cash register equipment registered with the tax service
Merchant account	merchant’s personal account in the system
Merchant	retailer and service outlet connected to the system
IPS	international payment system (VISA, MasterCard, Union Pay, JCB, American Express, Diners Club)
Gateway, Payler	Payler payment gateway
Issuing bank	payment card issuer
Operation	operation of money transfer from one account to another
Payer, user, merchant's client	person who makes payment for goods or services on the merchant's website using a bank card or receiving a transfer to the bank card from the merchant's account
PCI DSS	(Payment Card Industry Data Security Standard) unified international data security standard of payment card industry