Advice on Robo-Signed 1st

[Casey Mericle]

Situation: My company foreclosed on a NPN 2nd and shortly thereafter got served by the 1st. After looking through all of the documents we noticed that the first assignment (1st of 3) was completed by a known robo-signer back in the heyday of the late 2000s. I'm in the midst of trying to negotiate a reduced payoff on the 1st but am dealing with a pretty large servicer who won't give me the time of day. The attorney for the first doesn't sound interested in playing ball.

Any thoughts or strategies regarding a reduced payoff for something like this?