ESA 50 every 6 months?

Hello all,

My mum was recieving ESA at the assessment rate and sent in her first ESA50 (the questionnaire), had the medical in Oct '12 and was turned down at appeal - she's waiting for a date for her tribunal, but this morning another ESA50 has arrived.

She has spoken to the DWP and they stated that even though she's going through the tribunal the ESA50 is sent to everyone on ESA every 6 months regardless.

I don't doubt it, but it's the first I've heard of it and I was just wondering if anyone else had the same happen? I'm guessing it's one of the new changes brought in?

Thanks :)