Wrong ref number in 143/1 arrear demand

Swa (Lead) (50 Points)

21 November 2011  

I have received 143/1 notice (via email) for AY 2008-2009 (like many others). This was due my mistake and I will have to rectify it

 

But the reference number give is as CPC/1112/H1/..   Here 1112 is for AY 2011-2012.   It should have been CPC/0809/.   Also "H" has some significance.. Any idea what it is ?