I have a tenant that is ignoring my attempts to contact, his lease ends tomorrow, he was given 30 days notice that lease will not be renewed.

Just hire a property manager to find you one, and make the lease contingent upon the closing of your sale. 

The current tenant had a lease that was good through October of 2018 but we just signed a new lease last week extending him another 12 months! 

Legally, you can't do anything because your tenant is under a lease.

This question is for long-time Cozy users, or anyone who has had one or more leases renew using Cozy.When you have a lease renew and you are re-signing the same tenant for another term, do you find it is most helpful to just change the expiration date in Cozy on the current lease, or do you create an entirely new lease with a new start and end date?

That made me think about this since the better blockchain projects utilize oracles, which are independent data gatherers, in addition to nodes that act as validators of recorded data entries.4) Leasing and Cash Flow Management: No, blockchains are not going to replace PMs.

I would consider leasing this house with an option to purchase to a tenant/buyer.

Then I email them their Lease.

The lease still applies. 

And before the property was sold they just renewed their lease for another entire year!