Question 1

What is a Merchant ID (MID) on a receipt?

Accepted Answer

A Merchant ID (MID) is a unique identification number assigned by the acquiring bank or payment processor to a business. It can be up to 15 characters long and is used to route transactions and settlement funds to the correct merchant account. Every business that accepts card payments has at least one MID.

Question 2

What is a Terminal ID (TID) on a receipt?

Accepted Answer

A Terminal ID (TID) is a unique identifier assigned to each individual point-of-sale device or register within a merchant's location. It allows the payment processor and merchant to track which specific terminal processed a transaction, which is important for troubleshooting, reconciliation, and fraud investigation.

Question 3

What is the AID on a receipt?

Accepted Answer

AID stands for Application Identifier, a hexadecimal code from the EMV chip standard that identifies which card application was used for the transaction. For example, A0000000031010 identifies Visa credit. The AID tells the terminal which payment application on the chip card to communicate with during the transaction.

Question 4

What is an authorization code on a receipt?

Accepted Answer

An authorization code (also called an approval code or auth code) is a 6-character alphanumeric code generated by the card-issuing bank to confirm that a transaction has been approved. It serves as proof that the issuer authorized the charge and is essential for resolving disputes and chargebacks.

Question 5

What does CVM mean on a receipt?

Accepted Answer

CVM stands for Cardholder Verification Method — the way the payment terminal confirmed the identity of the person using the card. Common CVMs include PIN entry, signature, and 'No CVM Required' (typical for contactless tap payments under the floor limit). The CVM used depends on the card's chip configuration, the terminal capabilities, and the transaction amount.

Question 6

What is a batch number on a receipt?

Accepted Answer

A batch number groups together all card transactions processed by a terminal over a period, typically one business day. At the end of the day, the merchant 'closes the batch' and sends all grouped transactions to the processor for settlement. The sequence number within the batch indicates the transaction's position in that group.

Question 7

Why is my card number masked on a receipt?

Accepted Answer

Card numbers are masked (showing only the last four digits) as required by PCI DSS (Payment Card Industry Data Security Standard). This regulation prevents the full Primary Account Number (PAN) from being stored or displayed on receipts, protecting cardholders from fraud if a receipt is lost or stolen.

Question 8

What does CONTACTLESS or TAP mean on a receipt?

Accepted Answer

CONTACTLESS or TAP indicates the card was read using NFC (Near Field Communication) technology. The cardholder held their physical card, phone, or smartwatch near the terminal instead of inserting or swiping. Contactless payments use the same EMV chip cryptography as chip-insert transactions but communicate wirelessly.

Question 9

What is the difference between authorization and settlement?

Accepted Answer

Authorization happens in real time when you pay — the issuing bank verifies funds and approves the transaction, placing a hold on the cardholder's account. Settlement happens later (usually end of day) when the merchant closes their batch and the actual fund transfer is initiated between the issuing bank, card network, and acquiring bank. Authorization is the promise; settlement is the money moving.

Question 10

What is a POS receipt?

Accepted Answer

A POS (Point of Sale) receipt is a printed or digital record generated by a payment terminal after a card transaction is authorized. It contains a compressed audit trail of the entire transaction: merchant identification, card details (masked), authorization proof, EMV chip data, and settlement information. It serves as proof of purchase for both the cardholder and the merchant.