But this is odd, I had originally saved a copy of this doc to my hard drive and I can see more of the header of the fax on it. I can't really make out the date, time might be 23:06 then 18185093625 then KEY PHARMACY PAGE 02.
There is a very faint partial stamp in the upper right hand corner.
It is illegible.
But if it is a fax stamp - this is the recipient's copy - not the sender's.
That's my forensic judgement;)
I followed your link and the header has been cropped off. It did say Key Pharmacy originally.