There will be occasions when your supervisor cannot validate documents. In these cases, they will usually advise you that they will keep this document first. Before it is sent to the recipient.
There will be occasions when your supervisor is unable to examine the documents. In these cases, they often advise you that they are filing this before. Before sending it to the recipient.
There will be occasions when your supervisor could check the documents. In these cases, they always give you a piece of advice that they will keep this document before, before sending it to the recipient.