Is a note written on a check memo line legally binding if cashed?
I payed my homeowners association dues but only payed the trash service part which in the memo part of the check I wrote for trash service and the month. They did cash the check so does that make them responsible for still pickup my trash even though I have not paid the rest of my association dues?
No, it is not legally binding. One party may not unilaterally change the amount owed or terms of payment by doing this. There is a common myth that the memo line on a check has legal force - it doesn't. It's just for informational purposes. While it helps to identify the purpose of a check, it does not bind the recipient. Think about it, if it was that easy to alter the terms of a payment, everyone would do it. For example, a person could write "payment in full" for a bill and be done with it. Additionally, the fact is that not every check can be that closely monitored for such notations; it would tie up commerce.
Bottom line, a recipient of a check without being bound by whatever may have been written in on the memo line.