It's White House stationary. The heading on the pic is something like rtm.peg or something. I don't speak nerd, I told ya. But the speculation is rtm stands for Release the memo, and that it suggests the Donald will release the memo, either under his own authority or he will approve the Congress releasing it. But Txhrl just said that Sessions just now told Nunez NOT to release the memo.
I don't know why that would happen, other than maybe Sessions is going rogue in a last ditch effort to save deep state. Lots of phone callse in DC at the moment, I reckon.