Then your wording in delivery note is not clear.
When you send delivery in the note you must have something along the line:
"Please find your files in the attachment.
You have 3 days to review the delivered files so please take your time to test and evaluate everything.
If you need revision or modifications that are within order budget/price please send me specific details of required modifications.
If you have problems opening the attachment notify me in inbox so I can provide you with assistance.
If required modifications are beyond the original price I will send you a custom quotation."
This is just a sample of one of the quick replies, so it will not be the same for every order.
If he doesn’t provide you with information about revision just deliver the same files again and include a message similar to the above.
By sending the " [quote=“teachernita, post:1, topic:617699”]
still checking everything
[/quote] he is abusing the revision button. He should send that as a message.