I upgraded to the 722 receiver back in Aug of 2008 and the tech took my old 625 receiver when he left. Now over 3-1/2 years later Dish is asking for the 625 back. They sent me a return kit. I got my paperwork from the upgrade out and the company that did the install is now out of business. I haven't called Dish yet. What is the best way to handle this? I am sure they will say it was never returned by the installer. What gives? Why are they asking for it back now?