[bluGill]

That depends on if they are handwritten, or some font that looks sort of like handwritten. At least until/unless AI can write thank yous that pass the Turing test. Right now the effort vs reward of a thank you is not worth it for most sales, and people can pick out computer generated thank yous.

Even then, Wal*Mart will never send you a thank you note - the cost of postage alone is too high. However car salesmen have long ago figured out it is worth writing a thank you - it only takes a few repeat customers to make the time and postage worth it.

That said, if you are a small business a handwritten thank you is good advice. Very few small business run a many customers with a low profit business model (only retail), and as such you are probably in one area where a handwritten thank you will help.