# Search for transactions
source: https://developer.mastercard.com/mastercom-extended/documentation/use_cases/searchfortrans/index.md

This use case demonstrates the process of an issuer or acquirer searching for a transaction. For more information, refer to the [Transactions](https://developer.mastercard.com/mastercom-extended/tutorial/seachtrans/index.md) tutorial.
Diagram searchtrans

**Step 1:** The issuer or acquirer searches for transactions.  

**Step 2:** The transaction search response contains any Claim IDs in Mastercom Extended already associated with the transaction. Claim IDs from the Mastercom API v6 system will not be in this response.

API Reference: `POST /transactions/searches`