# Lost Stolen Card
source: https://developer.mastercard.com/user-account-management-service/documentation/use-cases/lost-stolen-card/index.md

This use case is used when a cardholder needs to replace a card that was lost or stolen, with a new card. This use case uses payload encryption.

### Pre-requisites {#pre-requisites}

Following are the pre-requisites for the customer to use this endpoint:

Refer to payload encryption in [Use Cases](https://developer.mastercard.com/user-account-management-service/documentation/use-cases/index.md)

## Sequence Diagram {#sequence-diagram}

Diagram lost-stolen-card

##### Following are the execution steps: {#following-are-the-execution-steps}

1. The cardholder signs into the customer application.
2. The customer authenticates the cardholder.
3. The customer sends an encrypted request to the User Account Management to report lost or stolen cards.
   * The request for `/lost-stolen-cards` endpoint requires the following mandatory input parameters:
     * oldAccountId - The RANAC associated with the original account that is being replaced by the lost/stolen process.
     * actionCode - Indicates the type of action that is to be performed by the request.
4. The Mastercard API Gateway validates the customer's information and routes the request to the User Account Management in the case of a valid customer.
5. The User Account Management Service validates the encrypted request received through the `/lost-stolen-cards` endpoint.
6. The User Account Management Service updates the lost stolen account.
7. The User Account Management Service Sends a response with a successfully processed lost stolen request message (200).
8. The User Account Management Service sends a response with a status code of 4xx/5xx in case of an invalid request.

You will receive an error response for an invalid request or any missing request parameter. In that case, you need to update the input and perform step 3 again.

### Endpoint {#endpoint}


API Reference: `GET /lost-stolen-cards`

Note: For more information about the error codes, refer to the [Code and Formats](https://developer.mastercard.com/user-account-management-service/documentation/code-and-formats/index.md) section.