Does a tenant legally have to sign a lease in person?

[Caleb Friberg]

So I've got a couple that wants to rent out a house from us, one is in town and is able to sign tomorrow, the other is out of town for a while but can sign, scan and email a copy back to me tomorrow is well. Is this legally binding or does both parties need to sign in person? Any help is appreciated, I've never had to deal with this in the past. Thanks