Excellent advice, Remington. I would only note that I would say to put it in writing, even if you don't send it. Don't write it in an email, but put it in a word doc or google doc or something. The sooner the better, and you can always revise.

Before sending it to anyone, have someone you trust look at it and give you honest feedback about your language and tone. If you contact the assigner and he addresses it quickly, you'll never need to send it. You may, however, want to reference it later and if you wrote it down while it was fresh you'll have it.

I had this happen to me when I was still working games. It was one of the most disappointing things I experienced by a fellow official.

The right thing to do is call your assignor and copy someone of leadership of your association and inform them of the situation. Take the previous advice and WRITE IT DOWN exactly as you remember it. Then walk away. Come back to it in a few hours after you've done something else to clear your mind and read it again. Make sure you agree with it 100%. Then have someone you trust read and suggest edits.