I think I know the answer to this, but I'm not sure, and it's a good question, so I'll ask:
What is the accepted/proper way to correct a mistake made on a check?
For instance, I imagine that in any given January, some people accidentally date a check in the previous year.
Is there a way to correct such a mistake, or must a check be voided (and wasted)? Pointers to definitive information (U.S., Canada, and elsewhere) are helpful.