So I just went to PayPal and was creating an invoice template, and noticed there is a terms and conditions box. Meaning there I can put it my "protect my ass conditions" with the added line "by submitting the payment you agree to these terms and conditions" at the end ...I think that would do the trick. It's also nice that they give me an area to write a message to the client so that I can state was type of work will be performed and what kind of time to expect. For those of you not using PayPal for an invoice I recommend you checking it out at least, it's rather nice and a convenient/safe way for them to pay in my opinion. You can also save different "items" in case you offer multiple services. Such as Virus removal, Training/teaching, software installation, etc. Not sure how much of a cut PayPal plans to take out yet, but I plan to adjust my prices accordingly.
If I had a world of my own, everything would be nonsense.....Who in the world am I? Ah, that's the great puzzle. I'm afraid I can't explain myself, sir. Because I am not myself, you see?