Under the category: "Too Stupid", a true story out of San Francisco
It seems a man, wanting to rob a downtown Bank of America, walked into the branch and wrote "This iz a stikkup. Put all your muny in this bag." While standing in line, waiting to give his note to the teller, he began to worry that someone had seen him write the note and might call the police before he reached the teller window. So he left the Bank of America and crossed the street to Wells Fargo.
After waiting a few minutes in line, he handed his note to the Wells Fargo teller. She read it and, surmising from his spelling errors that he was not the brightest light in the harbor, told him that she could not accept his stick up note because it was written on a Bank of America deposit slip and that he would either have to fill out a Wells Fargo deposit slip or go back to Bank of America.
Looking somewhat defeated, the man said "OK" and left the Wells Fargo. The Wells Fargo teller then called the police who arrested the man a few minutes later, as he was waiting in line back at the Bank of America.