My friend fell for this about 10 years ago in the Los Altos area, he said he lived at the back of her and has seen her in the pool. He needed 50 € for locksmith and she gave it to him. She said he was Swiss.
My friend went back home for the summer and people renting the next door apartment then had a visit from him saying he was a good friend of my friend. Same story but this lady didn’t give him anything, but she was scared, stayed up all night constantly checking front door and windows.