I know that OLD sites uses people's IDs without permission to wink at others to get them to pay and sign up to find out who winked at them so he is likely telling the truth.
If you always going to wonder then just end the relationship now. I would think there is no way he or you can prove it one way or another.
And if that is the case, you will be in a relationship looking out for any lies or inconsistencies from him and is that a way to have a relationship?
So do yourself and him a favor and end it now.
Thank you for the responses, it does help to clear up my confusion regarding online dating.
I am just cautious and don't want to get hurt.