I was a passenger in a car accident police didn't took my information because I didn't have any id with me are the cops allowed to do that?

You was a passenger... its not uncommon

I do not think it is against the law to -not- take the info from a passenger. Like smoothy, its not uncommon.

---I was a passenger in an accident, they did not ask anything of me other than if I was OK.

are the cops allowed to do that?Hello a:

Sure they are. If you have an insurance claim, the cops have nothing to do with that.

excon

The cops are primarily interested in who was operating the vehicle's at the time of the incident. They aren't required to document everyone involved.
Why do you even want your name associated with the wreck? If it's for insurance purposes, the person driving at the time could affirm your presence by way of an affidavit.