Hi Grandma and Welcome!

I wouldn't worry. The responses here are excellent. This is what makes a great board.

Aaamedsworldwide used to use USPS a long time ago. I remember once when I had a Saturday delivery and girl in blue jeans showed up and knocked on my door. Becuase I was not home to sign for the meds when the mailman came that day, they sent her about an hour later for re-delivery. She told me she was a contractor for the post office and worked on Saturday and Sundays doing this.