Can my tenants send a picture of the signed lease?

[Neil Hunter]

I'm managing a property remotely, and rather than drive down there, I'm considering just having my tenant take a picture using his phone of the signed lease agreement. He's been in the house 3 years now and I trust him. I have already emailed him the lease agreement, and I was considering having him print it out and sign it.

I'm just wondering, is this legally binding? Or is it considered more "valid" if its a physical fax copy?