# APM Checkout (Blik)

- [Overview](/legacy/apm-checkout-blik/overview.md)
- [Process Flow](/legacy/apm-checkout-blik/overview/process-flow.md)
- [Testing](/legacy/apm-checkout-blik/overview/testing.md)
- [Errors](/legacy/apm-checkout-blik/errors.md)
- [Error object](/legacy/apm-checkout-blik/errors/error-object.md)
- [Errors type list](/legacy/apm-checkout-blik/errors/errors-type-list.md)
- [Decline errors code list](/legacy/apm-checkout-blik/errors/decline-errors-code-list.md)
- [Create a checkout session](/legacy/apm-checkout-blik/create-a-checkout-session.md)
- [Retrieve a Checkout Session](/legacy/apm-checkout-blik/retrieve-a-checkout-session.md): Retrieves the details of an existing checkout session. You need only supply the unique checkout session identifier that was returned upon creation.
- [Webhoook Event Notification](/legacy/apm-checkout-blik/webhoook-event-notification.md)
- [Pay a Checkout Session](/legacy/apm-checkout-blik/pay-a-checkout-session.md)