Sadie Cohen lived in an integrated neighborhood in Long Island, New York. Her neighbor was a very generous African American woman who stopped by one Saturday and said, "Mrs Cohen, I have to go to NYC this afternoon to meet my daughter. Can I get you anything while I'm there?
Mrs. Cohen thanked her and exclaimed "Listen, I have a commuter ticket for the train. Why don't you use my monthly pass and you'll bring it back tonight. After all, it's all paid for -- why should you pay extra?"
The neighbor thanked her and got on the train. As the conductor came through the train, he glanced at the ticket and noticed the name "Sadie Cohen".
"Excuse me madam," said the conductor. "Are you Sadie Cohen the person whose name appears on this ticket?"
The woman smiled sweetly and shook her head affirmatively.
A little suspicious, the conductor asked, "Would you let me compare signatures - would you please sign your name?"
The Black lady turned indignantly and snapped, "Man are you crazy? You want me to write on Shabbos?"