Save forms but deactivate them

I have a series of forms that I have created to test some things. I want to keep them on file but need to check that they are not ‘activated’ in any way.
or, to come at it another way…
How do I check which of the forms I’ve created is the actual live one so I can keep it as is and deactivate the rest?
(I’m getting lots of spam emails and I need to identify which of the several forms I have is ‘live’ somewhere so I can stop it from letting the spam through.)
thanks
Chris