> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/secure-card-display/get-started/mange-end-users/manage-end-user-life-cycle.md).

# Manage end user life cycle

This page describes how your **issuer backend** can update end user information and delete an end user in the **D1 backend**.

For end user registration, see [Register end users via API](/secure-card-display/get-started/mange-end-users/register-end-users-via-api.md).

### Update end user information

D1 lets your issuer backend update the personal information stored for an end user (called a `consumer` in the D1 API).

#### Sequence diagram

<figure><img src="/spaces/62lLFDcmLCeqqwmy4Fee/files/rzprb6v0WWEe6S9VKKdH" alt=""><figcaption><p>Update end user information flow between the issuer backend and the D1 backend.</p></figcaption></figure>

#### API endpoint

From the issuer backend to the D1 backend:

* [Update consumer](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/consumer-api.md#post-issuers-issuerid-consumers-consumerid-operations-update)

### Delete an end user

D1 lets your issuer backend logically delete an end user.

When you delete an end user:

* The end user transitions to the `DELETED` state.
* You can no longer create new cards for the end user.
* D1 deletes all cards linked to the end user, including digital cards.

#### Sequence diagram

<figure><img src="/spaces/62lLFDcmLCeqqwmy4Fee/files/1Ip4KmG7JiqLkjk2Ep6P" alt=""><figcaption><p>Logical end user deletion flow between the issuer backend and the D1 backend.</p></figcaption></figure>

#### API endpoint

From the issuer backend to the D1 backend:

* [Delete consumer](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/consumer-api.md#post-issuers-issuerid-consumers-consumerid-operations-delete)


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