I've also had problems with my parents sending my EAD via mail. Before you start the long and expensive re-filing process, you really need to verify with the USPS (or whichever carrier your mother used) that they don't have your card. It's very rare that they outright lose mail, so check with them one last time. Here's a good starting point: http://blog.stamps.com/2012/05/29/ho...er-or-package/