I mailed back a card to a seller because I won a SNAD case but when I put in the tracking number to usps it gives me this message-
Delivery status information is not available for your item via this web site. A return receipt after mailing may be available through your local Post Office.
Granted I printed it out around 11:59pm yesterday and gave it to the clerk at the post office this morning should I be worried when it comes to showing it has been delivered? BTW it was over $250 so I used priority mail with sig confirmation