# Glossary
3-D Secure is a protocol that provides an additional level of security through two-factor authorization of payment from a bank card (usually using a code from SMS).
CVV/CVC code – code used to authorize payments on the Internet, which is indicated on the back of the bank card. VISA uses the designation CVV or CVV2, MasterCard uses CVC or CVC2.
MCC code (MCC, Merchant Category Code) – merchant category code. It is a four-digit number and classifies sellers by the type of their activity for payment systems Visa, MasterCard, MIR.
AFT-operation (AFT, Account Funding Transaction) – type of operation for sending funds from the payer’s card to the recipient’s bank account (card2account). This is not a regular payment transaction, due to which, for example, when paying by credit card, the payer will not have a grace period.
Terminal is a hardware and software complex that ensures the acceptance of Payments and payments to bank cards. The name of the terminal and its MCC code are indicated in the payment history statement of the payer’s card.
Ecom-terminal is the collective name for terminals with MCC codes used for online purchases.
AFT terminal – a terminal configured to create AFT operations and used as an alternative to the Ecom terminal. An AFT transaction is equivalent to a funds transfer transaction, due to which these terminals can be used for financial organizations, and have a different charging method.
Authorization (auth) – a type of transaction in which funds are blocked (frozen) on the payer’s card (no actual debiting of funds from the card occurs). Holding is valid for up to 7 days. This method is recommended if most holding transactions result in a write-off for the full amount.
Pre-authorization (preauth) is a type of transaction in which funds are blocked (frozen) on the payer’s card (no actual debiting of funds from the card occurs). Subsequently, you can request payment within the pre-authorization amount or cancellation of authorization (Cancellation of authorization can also occur automatically at the request of the issuing bank if settlements are not completed after a few days, the number of days depends on the MCC code of the terminal, but not less than seven).
Cancellation of authorization (reversal) - the type of operation by which you remove the blocking of funds within the framework of a previously carried out authorization or pre-authorization. If payment was made for an incomplete amount of pre-authorization, then the remaining amount is canceled automatically.
Payment is a type of transaction in which funds are debited from the payer’s card. It can be carried out both within the framework of preliminary authorization (and cannot exceed its amount) or independently.
Payment cancellation (refund) is a type of operation in which a previously completed debit of funds (payment) is canceled and the funds are returned (full or partial) to the payer’s card.
Single-stage payment - a payment scheme in which funds are debited from the payer’s bank card (an operation with the type payment is used, without an authorization link).
Two-stage payment - a payment scheme in which you first block funds on the card (perform authorization or pre-authorization), and then make a payment within the holding amount or request cancellation of authorization.
Recurrent payment (auto-debit) – payment using a full card data token without re-entering card details, initiated by you.
Card tokenization is the process of storing payment data in which the card number and other sensitive information is entered and stored in accordance with PCI DSS standards on Mandarin servers. You receive a token, which will be the card identifier.
Card token is a unique alphanumeric combination that is used as a card identifier. The set of actions with a token depends on the set of initially saved data, as well as on the status.
Tokenization of full card data – a type of operation in which the card is tokenized, as well as its verification: payment of the checksum and subsequent cancellation of the payment.
Payment to card is a type of transaction in which funds are credited to the recipient’s bank card from your bank account within a few seconds.
Chargeback is a procedure in which the payment amount is debited from the recipient without acceptance and returned to the payer, after which the responsibility of proving the truth of the transaction is assigned to the recipient.
RRN (retrieval reference number) – a unique identifier of the transaction in the system of the issuing bank of the payer’s bank card.
SMEV (system of interdepartmental electronic interaction) is a federal information system that allows government agencies, banks and other SMEV participants to exchange data necessary to provide public services to citizens and organizations in electronic form. Verification of an individual’s personal data in the SMEV system is a prerequisite for his simplified identification.
Merchant is a legal entity or individual who accepts funds from clients or pays out funds.
Marketplace is a merchant (legal entity only) that has the ability to send requests for deposit/withdrawal of funds on behalf of other merchants (sub-merchants).
Sub-merchant is a merchant (legal or individual), funds to whose account are credited (in case of receiving payments) or debited (in case of payments) upon request from the marketplace.
ESP (Electronic means of payment) is a means or method that allows the client to accept and send money transfers using bank cards. Limits on the amount of transfers depend on the level of identification (ESP 1, ESP 2, ESP 3).