Anything with toxic thermal paper immediately goes to the trash if I can help it. Other than arguably being bad for the environment (so much paper wasted) they can also be harmful to you simply from touch. E.g. "A significant increase in urinary total BPA concentration was observed for cashiers handling daily thermal paper receipts. " [1][2]

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4927604/

[2] https://www.consumerreports.org/cro/news/2014/03/the-health-...