Glossary of the main business and functional terms used in Checkout API documentation.
Term
Checkout
Description
A payment session created by the merchant to collect money for an order. Includes order, payer, and payment data representing the full payment process.
Term
Merchant
Description
A registered business entity authorized to accept payments through maib’s acquiring system.
Term
Terminal
Description
The merchant’s point of sale or integration endpoint through which transactions are processed.
Term
Order
Description
The purchase or service request initiated by the customer and represented in the checkout process.
Term
Payer
Description
The customer who performs the payment using one of the available payment methods.
Term
Payment Method
Description
The channel used to make a payment (e.g., MIA QR, Card, Apple Pay, A2A).
Term
Refund
Description
The process of returning funds for a completed payment due to a cancellation or return.
Term
Callback
Description
A system notification sent by maib to the merchant’s server containing the final payment result.
Term
Sandbox
Description
The testing environment that simulates transactions without real payments.
Term
Status
Description
Indicates the current state of the payment or checkout (Created, WaitingForPayment, Completed, Cancelled, Refunded).
Term
Signature
Description
A digital verification hash confirming the authenticity of callback notifications.
