Continuity mistake: When Walt asks for the RV to be destroyed, there is tape over the bullet holes on both the inside and the outside of the door. However, when Hank is showing the bullet holes to the owner of the lot, he takes the tape off the outside and the light shines on Walt. No-one has touched the tape on the inside. (00:28:50 - 00:36:00)
Continuity mistake: Walt asks Gale to recite the poem he mentions, which Gale does, reluctantly. When he starts the first line, the camera is behind him and he lifts his head to look up at Walt straight in the eyes. When the camera cuts back to a shot of his face, he's suddenly looking down again.
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