> For the complete documentation index, see [llms.txt](https://docs.senmo.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.senmo.io/segment-ledger/core-concepts/transaction.md).

# Transaction

A transaction represents a financial event.

Examples include:

* Deposits
* Withdrawals
* Transfers
* Card Payments
* Bank Transfers
* Fees
* Refunds
* Reversals
* Interest
* Adjustments

Every transaction consists of one or more accounting entries.

Transactions are immutable once completed, providing a complete audit trail.