Is there such thing as a hookup ID?

Unfortunately, its usually a scam. You may have seen advertisements for Safe Dating Verification sites that offer so-called hookup IDs or something similar. They are all fake knockoffs; no such legitimate product exists. Dont give these websites or individuals your credit card or other personal information.

What does a star mean on eharmony?

In order not to lose track of matches you are particularly interested in, you can add them to the Favorites tab. On your Matches tab, simply click on the star icon at the top right of their photo card. The star will fill in and your match can then be found on the Favorites tab.