Corrected entry: When Reed repairs the cash machine in the foreign country, he has nearly a week of stubble, or close to that. When he gets back home, he's clean shaven.
Correction: After watching this scene, Reed (who has contorted his face to disguise himself at the register) does not have stubble, and certainly not a week's worth. There are shadows that may look like stubble, but then we watch him change back to his regular face in the car, and any growth remains the same.
I don't buy it. Reed's facial hair repeatedly disappears/reappears during the movie. It is due to the movie re-shoots. It is even mentioned on Wikipedia.
Regardless of mistakes in other scenes, this particular scene shows no evidence of a mistake.
Chosen answer: No, no one from the film asked him to do a cameo. Stan Lee has said he never requests a cameo and waits to be asked.
Bishop73
I read on IMDb that he declined to make a cameo in this movie.
I've never heard him say he declined the cameo. I think maybe the entry was made from an assumption of what Lee told Larry King. Lee mentioned he wasn't in one of the X-Men films or this film and said sometimes the films are shot too far away and he can't travel half way around the world to be in a cameo. But this film was shot primarily in Louisiana and did have a scene shot in Los Angeles supposedly.
Bishop73