Had one recently., a first clean/one off.
She had messaged me to clean the windows and power wash her path. I gave her a price and, as I don't do power washing, passed her number to a friend of mine who does.
After a couple of reschedules, I did the windows. Went back for money and got told to go back on a specific evening, which I did a couple of times, by which time I realized I had been taken. My friend got sone of his money, but not what had been agreed.
I just put it on the back burner. As far as I am concerned, I haven't written the debt off and will remind her if she ever contacts me again (which I find people do when they think I have forgotten that they owe me).
Some people have no shame.
John