I wrote a letter of complaint regarding my assessment carried out in January. Reason? The usual story of lies, and not documenting important and relevant things. I got a letter this morning from ATOS stating that they AND the DWP cannot locate my ESA50. They go on to say they will keep trying to track it down (!) but, they cannot continue their investigation without it. They asked me if I had a copy, and would I send it to them - but I haven't got a copy because I had no access to a photocopier at that time. Not sure where to go from here, it seems I have rattled their cage (medical evidence such as x-rays, rheumy reports etc) but they have retreated behind "we cannot investigate further" using the "missing" ESA50 as an excuse!!!!