Dear Prudence, 
Eight years ago, I was fired from a company that I had been with for seven years. They claimed I discussed confidential bonus information with an employee, but when I asked for their proof (which they said they had), they wouldn’t show me anything. I did not and would not do anything like that. It wasn’t like I could go to HR about it either, I WAS the HR person. To this day, I believe I was fired because my boss didn’t like the fact that I knew more about HR than she did and the employees respected me more. She had the VP believing she couldn’t do anything without her.
My question: Can I send my former boss a thank you letter, letting her know that she did me a favor? I am at a much better company; I love the job I do and I am making more money than that company would have ever paid me. I am well respected and considered a great asset here. If it wasn’t for them letting me go, I would never have found this job or company. I know it sounds petty, but so much good has happened to me since I left there, I actually feel grateful that they did that to me!
—Grateful for Being Canned