If you want to automatically delete archived requests, you can control that via Your Account > Settings > Credit Ready. This option is disabled by default.
Note, that it is not possible to recover deleted requests. Once they are deleted, they are gone.
When you enable this option, you need to set the number of days for which requests should be automatically deleted. The minimum number of days is 31, the maximum number of days is 180.
The number of days will count from the day you archive the request. Deletions are scheduled at approximately 2 a.m. daily.
You can unarchive a request to cancel the programmed deletion.