Last year, I sent away my request for a Phil Collins signature and reply. I believe I sent it away in
January and they received it on the 4th of April, 2010.
I can't remember when I received it though. Here is the signature:

I actually rubbed the writing a bit to see if It was real, and it did smudge only a little. I'm guessing it's authentic but
you guy's are more experienced.
Cheers!

Address:
Phil Collins
Philip Collins Ltd.
Ground Floor
25 Ives Street
London, SW3 2ND
UK