<prompt> Human: I put my wedding dress on letgo, the app where you can sell locally, and someone offered me around what I was asking and I said yes. She says she lives a few states away and is currently in the process of moving so she and her fiance will send a certified check and the movers will pick up the dress when I see the funds in my account. She sent me the tracking number and everything. And I had it sent to my old job. Well it arrived today and Im going to go pick it up but Im wondering if this could possibly be a scam to somehow hack into my bank account, or could I just cash it?Please help.  <response>: When I sold things on Etsy, I only accepted US PO money orders. You can get one at any post office and cash it at any post office. Once the PO cashes it and gives you the money, THEN Id send dress. 