# 6. Payment

- [Async](https://paywall.gitbook.io/en/physical-pos/6.-payment/async.md): Async Payment
- [1. Sale](https://paywall.gitbook.io/en/physical-pos/6.-payment/async/1.-sale.md): You can use this service to send an async sale request to your terminals.
- [2. Cancel](https://paywall.gitbook.io/en/physical-pos/6.-payment/async/2.-cancel.md): You can use this service to send an async cancel request to your terminals.
- [Sync](https://paywall.gitbook.io/en/physical-pos/6.-payment/sync.md): Sync Payment
- [1. Sale](https://paywall.gitbook.io/en/physical-pos/6.-payment/sync/1.-sale.md): You can use this service to send a sync sale request to your terminals.
- [2. Sale/Rollback](https://paywall.gitbook.io/en/physical-pos/6.-payment/sync/2.-sale-rollback.md): You can use this service to send a sync sale rollback command to your terminals.
- [3. Cancel](https://paywall.gitbook.io/en/physical-pos/6.-payment/sync/3.-cancel.md): You can use this service to send a sync cancel command to your terminals.
- [4. Cancel/Rollback](https://paywall.gitbook.io/en/physical-pos/6.-payment/sync/4.-cancel-rollback.md): You can use this service to revoke sync cancel commands sent to your terminals.
- [1. Payments](https://paywall.gitbook.io/en/physical-pos/6.-payment/1.-payments.md)
- [2. Payments/Activities](https://paywall.gitbook.io/en/physical-pos/6.-payment/2.-payments-activities.md): You can use this service to retrieve a list of the transaction steps for the payments you have made.
- [3. Payments/Products](https://paywall.gitbook.io/en/physical-pos/6.-payment/3.-payments-products.md): You can use this service to retrieve a list of the transaction steps for the payments you have made.
- [4. Query](https://paywall.gitbook.io/en/physical-pos/6.-payment/4.-query.md): You can use this service to query your sales orders on your terminals.