
Continuity mistake: When Walt breaks the news that Gray Matter is broke, Skyler's hands are on her stomach, we then see her hands are by her mouth. (00:38:50)
Continuity mistake: At the very beginning of the episode, Skinny gives Jesse the address on where he can find the junkies who robbed them. When we see the piece of paper, the street name is Pampas. When Jesse gets out of the car, we see the real street signs, and that the house is on 13th and Marquette.
Continuity mistake: When Walt and his wife are on the couch talking about Gretchen saying she was not going to pay for the treatment any more, Walt puts his hand to his mouth when she says that she called Gretchen back but she wouldn't pick up. His hand is over his mouth with his fingers pressed up against his nose. When it cuts to a different angle, suddenly it is just one finger against his lips.

Negro Y Azul - S2-E7
Continuity mistake: At the start, the writing on the blackboard changes style. Note the "CH3". (00:04:30)

Negro Y Azul - S2-E7
Continuity mistake: When Skyler is talking to Ted about having a girl, Ted's arm is half off the table in one shot and fully on the table in the next shot. (00:20:10)

Negro Y Azul - S2-E7
Continuity mistake: When Skyler asks Marie if she is going to El Paso, Marie's glass of wine is a fair distance from the blue jug on the side. Camera cuts and now it is next to said jug. (00:28:20)

Negro Y Azul - S2-E7
Continuity mistake: When Skyler and Marie are talking about going to El Paso, Skyler puts a red pepper down on the near side of a cucumber. Camera changes to another view and now the pepper is on the far side of the cucumber. (00:28:30)

Negro Y Azul - S2-E7
Continuity mistake: When Walt comes in and speaks to Marie, Marie has her wine glass on the side, camera changes and now it's in front of her face. (00:30:00)
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