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# Transactions

Transactions are the fundamental unit of operation in IXOPAY platform. They are used to execute payments, reference for follow-up transactions, register customer profiles, among other operations. This section provides comprehensive reference materials on key aspects of transactions.

Find in-depth information about:

## Articles

In this section, you will find detailed information and resources to help you understand transactions within the IXOPAY platform. Explore the following topics to gain insights into transactions:

#### [Transaction types](https://documentation.ixopay.com/docs/reference/concepts/transactions/types)

All supported transaction types — debit, preauthorize, capture, void, refund, payout, register, deregister — with their stages and use cases.

#### [Transaction indicators](https://documentation.ixopay.com/docs/reference/concepts/transactions/indicators)

Transaction indicator values explained: SINGLE, INITIAL, RECURRING, CARDONFILE, and FIRST-CARDONFILE for card-on-file and recurring payment flows.

#### [Transaction return types](https://documentation.ixopay.com/docs/reference/concepts/transactions/return-types)

The five possible transaction return states explained: FINISHED, REDIRECT, PENDING, ERROR, and CANCEL, with guidance on handling each outcome.