Continuity mistake: While Gus speaks with Eladio beside the pool the sun changes on the floor between shots.
Problem Dog - S4-E7
Continuity mistake: When Jesse is emptying the cigarette, his fingers are right at the end of the cigarette. Camera cuts and now they are up the other end. (00:19:20)
Box Cutter - S4-E1
Continuity mistake: During the diner scene when Jesse is eating, Walt asks him how he's doing. Jesse's head changes positions several times between shots. From looking out of the window, to back down at his plate, to back out of the window, to straight ahead again, all between shots.
Answer: Saul is a criminal himself. It's not past his capabilities to forge some documents to show the 857k is available.
Ssiscool ★
Forged documents by Saul is most likely the correct answer.
The_Iceman