The best tip I can offer is that if you think there has been an oral modification to your agreement with another party, write down the change and
send it to the other party. Write it down on a cocktail napkin, make a copy, and send the napkin -- even that is better than nothing!
The material contained herein is provided for informational purposes only and is not legal advice, nor is it a substitute for obtaining legal advice from an attorney. Each situation is unique, and you should not act or rely on any information contained herein without seeking the advice of an experienced attorney.