Continuity mistake: When Emilio's body crashes through the ceiling and lands on the downstairs floor, there is one huge chunk of carcass that lands on the floor in one piece. When the remnants of the body are shown from a different angle, they have been replaced with numerous, smaller chunks. (00:45:30)
Continuity mistake: At the end when the girl puts the mask on there is a bit of hair hanging over the front of the mask. Camera changes and the hair has disappeared. (00:46:10)
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