URBANA, ILLINOIS -- Although in general Zipcar represents a good service concept, they seem to prey on the membership fees. The only way to pay your annual membership fee is by automatic renewal from a registered credit card. Most importantly, there is no way to cancel the user account on-line.
In my case, the registered credit card has expired with time and I decided not to renew as I did not rent zipcars by then. They initially sent an email asking for card update and explained that if not updated, the account would be closed. That was what I wanted, I thought, and did not update card info thinking the account would indeed be closed. Instead, Zipcar renewed my membership, posted a billing charge and harassed me via email that if I did not pay the outstanding membership balance they would transfer it to Collection. So, I had to call customer service and personally ask to close my account. They ware asking for various forms of identifications, and surprisingly, my home address, phone and email were not enough. She needed specifically the user name, last 4 digits of the expired credit card, and a second address that was not a billing address. I am glad Zipcar does not ask your mother's maiden name. So, those who wants to cancel, be prepared to gather unconventional info. Is not this strange in the era when one can shop and totally manage a bank account on-line, Zipcar does not allow closing a simple service account on-line?
They also do not respond to emails. I tried two times using address posted on their Contact Us page.