API Overview

Payments Developer Guide
- Recent Revisions to This Document

Introduction to Payments
- Financial Institutions and Payment Networks
- Card Types
- Transaction Types
- Payment Services
  - Authorization
  - Sale
  - Authorization Reversal
  - Capture
  - Credit
  - Void
- Payment Features
  - Debit and Prepaid Card Payments
  - Payer Authentication
  - Relaxed Requirements for Address Data and Expiration Date in Payment Transactions
- Testing the Payment Services

Standard Payment Processing
- Basic Authorization
- Authorization with Line Items
- Authorization with Payment Network Tokens
- Authorization with a Card Verification Number
- Account Verification with a Zero Amount Authorization
- Pre-Authorization
- Authorization Reversal
- Sale
- Sale with Payment Network Tokens
- Capture
- Multiple Partial Capture
- Follow-On Credit
- Stand-Alone Credit
- Void for a Capture or Credit

Debit and Prepaid Card Processing
- Additional Resources for Debit and Prepaid Payments
- Processing Debit and Prepaid Authorizations
- Enabling Debit and Prepaid Partial Authorizations
- Disabling Debit and Prepaid Partial Authorizations

Payer Authentication Processing
- Additional Resources for Payer Authentication
- Providing Payer Authentication Information for Authorization
- Mastercard Identity Check
- Visa Secure

Relaxed Requirements for Address Data and Expiration Date in Payment Transactions

On This Page

CVN Locations and Terminology

For most cards, the CVN is a three-digit number printed on the back of the card, to the right of the signature field.

For American Express, the CVN is a four-digit number printed on the front of the card above the card number.

Image depicting the location of the CVN on the back of most cards and the front
of an American Express card. — CVN Locations

Each payment card company has its own name for the CVN value:

American Express calls it the card verification value
(CVV).

China UnionPay calls it the card validation number
(CVN2).

Discover calls it the card verification value
(CVV).

Mastercard calls it the card validation code
(CVC2).

Visa calls it the card verification value
(CVV2).

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