.______ Move-In:I / we acknowledge I have received the key(s) to the premises and now take possession and responsibility for the property as agreed in my / our rental agreement.Quantity of keys given out: ________________________________________________________________________Keys given to Tenant by: _____________________________________________________________________________Keys accepted for Tenant by:________________________________________________________________________________ Move-Out:I / we have vacated my / our residence at _________________________________________________________________.

Seriously concidering adverse possession :D

It's still nice to get but the emotional payoff is not as high as the first million, first 10 million, etc.If you treat people right, learn the skills and knowledge, find your passion, and never give up that is most of the battle to success.Very few people possess all these traits together.

from tenantrescourcecenter.org: Tenants in Wisconsin have the right to exclusive possession of their apartment.

You're asking for trouble if you turn over possession with them already owing you money. 

Hello All,I'm new to biggerpockets and to real estate in general, so the only knowledge and experience i possess is purely academic and from conversations (and biggerpockets of course).

Cities can't just take property.. and property tax's are the possession of the State not the city and county unless there are city specific tax's like  Memphis TN has... the county foreclose's on tax sale properties as an agent for the state.. at least in most states I deal in. ?

By "winning" the eviction, you were awarded a judgment and possession of the property.

I suppose the problem is partially that he's extremely lazy (does nothing all day answers the door in his underwear) and also that maybe to him the trash in his yard are his worldly possessions that he can't live without. 

That's certainly not the case for California, and OP needs to check how it's done in AZ.Sheriff here doesn't do jack unless we get a judgment of possession, late in the eviction phase.