keeping someone from signing up for multiple trials

[horse43]

i was wondering what i need to do to make sure that someone doesnt take advantage of a free trial and keep signing up for multiple trials after they cancel their trial in paypal?

or is this sort of thing already built in to s2members?

thanks for all the hard work, this is a great plugin!

[Harty]

Unless a user deletes their name and email from your system, the system will not allow the same name or email to be registered twice. Try it.

[Cristián Lávaque]

If this is something that worries you very much, you may want to consider a model where you don't offer trials. There's always a chance that some may want to abuse trials, but they may be a group of users that wouldn't have paid anyway, so you're not losing much.