What would happen if someone lost a money order in the mail? A guy is buying my 300 Ultra Mag and he mailed the MO over a week ago. We are thinking it got lost in the mail. How is he going to go about cancelling these and how long will it take to get new ones re-issued. He went through Western Union......one is for $1,000 and the other is for $340. I have been waiting for like two weeks since we made this deal and now it looks like it may be another while before he gets these re-issued. I told him I will wait till Monday then call him if they haven't arrived yet.