# Account validity API This API allows a server administrator to manage the validity of an account. To use it, you must enable the account validity feature (under `account_validity`) in Synapse's configuration. To use it, you will need to authenticate by providing an `access_token` for a server admin: see [Admin API](../usage/administration/admin_api). ## Renew account This API extends the validity of an account by as much time as configured in the `period` parameter from the `account_validity` configuration. The API is: ``` POST /_synapse/admin/v1/account_validity/validity ``` with the following body: ```json { "user_id": "<user ID for the account to renew>", "expiration_ts": 0, "enable_renewal_emails": true } ``` `expiration_ts` is an optional parameter and overrides the expiration date, which otherwise defaults to now + validity period. `enable_renewal_emails` is also an optional parameter and enables/disables sending renewal emails to the user. Defaults to true. The API returns with the new expiration date for this account, as a timestamp in milliseconds since epoch: ```json { "expiration_ts": 0 } ```