You are responsible for all your transactions / documents within your ValidSign environment. If you don't delete your transactions or documents, they simply remain in your environment. If you are only a signatory, a transaction can be executed by the owner of the transaction, this transaction deleted within a few days per week. As a result, the documents you have signed are no longer available in the ValidSign environment.
ValidSign is not a dedicated solution for keeping your documents. After signing, always store your documents in your own document management system.