Can Google Provide Proof of Delivery of PPCs?

[Joseph P Barnes]

I think not or at least that is what they told me. In fact I have emails from them telling me
that I had agreed to their metrics and could not argue with them. Well, everyone has to agree to
Google's metrics if they want to advertise on Google. But that does not mean their metrics can
be in error.
Every other type of advertising offers proof of delivery of the advertisement, from Logs, to
copies of the advertisement and magazine, etc. But not Google. They tell you that is impossible.
Well that may be, but my web analytics told me Google overcharged me (and it also told me
Overture did the same). When asked, Google could not or would not provide me with the proof of delivery. And my only alternative was to cancel my advertising.
Has anyone else ever had this experience??