My friend went to the vet with her cat. There was a woman there with a cat that got poisoned. She didn’t have the money for the treatment, so she signed an agreement that she’d pay before some date.
My friend and her husband asked the vet if they could pay for the treatment and said they didn’t want the money back. One year later, my friend got a bank transfer with a note, “Thank you for your help in September 2019!” She most likely got the number from the vet. We decided to donate the entire amount to an animal shelter.