Late Rent because of errors on check

[Dale Loo]

Hello,

My tenant is upset because I am charging him a late fee because his check had an error on it and the bank would not cash it with that error. He says he should not be assessed a late fee because he sent me the check early enough that I could have let him know about the error. Unfortunately, I did not see the error prior to going to the bank, nor do I really think it is my responsibility to proofread his checks. Am I in the wrong????

Also, these types of instances seem to happen from time to time with my other tenants as well. I really want to move away from checks- any luck using other systems? Like online?