<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by bocastephen:
Needless to say, I have disputed the charge with the CC company, and will expect Avis to properly refund the over-charge.</font>
Why would you expect Avis to refund you anything at this point since you've disputed the charge?
If it were me I would have called Avis and given them at least one chance to fix this error before disputing the charge ... the fact that you've disputed the charge will likely result in this taking much longer to resolve than if you had given Avis the opportunity to fix it first. I believe a merchant should be given an opportunity to correct an error before disputing a credit card charge ... in my experience the merchant will take care of it 9 times out of 10 much faster than a dispute can be resolved ...