you, as the sender, have to file the lost case with USPS and *hope* that she assists you on her end by following up with her postman/post office, too. the sender always has to file b/c they are the ones who purchase the original postage (which may/may not have insurance and etc. that can be refunded). start calling the post office/postmaster (in her city where it says it was delivered) immediately, time is of the essence when a package goes missing. the longer you wait, the less likely it is to be found. i think you have to wait maybe 14-21 days before you can officially file... until then you have to call daily, pretty much, and ask people to hunt down your item. if it's truly lost then tell her you'd be happy to refund after the USPS closes the case and issues you a refund for the insured cost or whatever. at least that way (if she's not legit) she doesn't get the item and money, too. but don't assume she's dishonest. i've had many items say 'delivered' and they were delivered... to wrong addresses and etc. postal people make lots of errors. 2 weeks is already a lot of time wasted and if it's truly lost you could probably file right away.