If it isn't in writing it is not binding. I am in sales. Some of you have long standing relationships with schedulers and may never have a problem with verbal promises.
I have had to cancel several assignments after being assigned the wrong date, wrong time frame, or a promised bonus not being documented by email or on the website.
That being said, I have seen several discussions here were a promised bonus was removed from the website after the assignment was accepted. Even with emails to prove themselves, someone higher up penalizes us instead of the schedulers.
I've pondered this very topic in my head for awhile now and have decided that there has to be some element of trust in life and in business. So, I operate much like Irene and Tarantado do.
My rational side constantly reminds me to get everything in writing as that is the prudent business choice. Then my real-world, common-sense kicks in and I realize that even if it is in writing and I am completely in the right on the issue, I am not going to pursue such a small amount through legal channels anyhow. If a scheduler or MSC won't honor their agreement with me, I will move to greener pastures.
Having said that, if something doesn't smell right or my spidey-sense is tingling, I will request the details in writing. Also, if the dollar amount of the project makes me uncomfortable, I will try to cover my bases in writing.