[aloknnikhil]

The first time you unlock the car, it always has to be using a physical card. I learnt this the hard way.

https://www.quora.com/Can-I-use-a-Zipcar-without-my-Zipcard

[ejstronge]

This has actually been relaxed of late, though I agree it used to be a requirement earlier in Zipcar history.

[loriverkutya]

Ok, so you say I just imagined it.