I know a similar story that is true.
After a fire had destroyed their store, Mr. & Mrs. B. had decided to retire. They took the insurance money and fulfilled their dream of retiring in Yerushalayim.
One day when Mrs. B. had a dental problem her dentist was unavailable (out-of-town, I think). Luckily a dentist had opened an office just next door, and he was able to see her.
Her problem was not a simple drill-and-fill, but required a few visits. At the last visit she took out her checkbook to pay and the dentist told her she had already paid. She knew she hadn’t, but the dentist told her the following story:
Once there was a young boy whose father sent him on an errand. His father gave him 15 cents and sent him out to buy toilet paper. Clutching the money in his hand, he dutifully went off to perform his assigned task. When he came home, his father asked him where the toilet paper was.
The boy had stopped on the way home to tie his shoe. He had put down the toilet paper and forgotten about it. He went back to look for it. It was no longer there.
Thinking that maybe somebody found it and returned it, he went back to the store and asked. “I’m sorry,” the woman in the store said. “Nobody turned in any toilet paper.” And with that, he began to cry.
The woman asked why he was crying and he explained the situation, and that his father would be very angry with him.
The lady handed him another package of toilet paper and told him to take that home and he needn’t tell his father.
“So you see,” the dentist continued, “you paid for this dental work when you gave me that package of toilet paper.”
I didn’t always live in Haifa. I used to live in Yerushalayim and I worked for that dentist. That’s how I know the story.