Misplaced the mail keys

My mom came down for the week, and some how, the mail keys got placed in her stuff and when I went to go check the mail the Monday, after I got out of school I couldn't find them and then she called me and said that she had found them in her stuff, so she's gonna ship it to my friends p.o. Box. But hopefully when I get the keys the mail box will be full of mail. So there will probably be like the end of the week mail, post hopefully