Your first step should be to file an opposing affidavit with the County Clerk rejecting the adverse possessor’s claim.

I have rejected may with a similar persona as your own. 

I am in Georgia where a landlord cannot evict a tenant if a partial rent payment is accepted, so I need a service that allows me to reject a partial payment. 

You MUST find some reason to reject her.

When I take application I require the tenant to pay a $30 application fee that is nonrefundable and a $100 towards the security deposit which is refundable if I reject the applicant.

When I rented out to this current tenant, I had rejected four other applications who wanted the place even if it meant I could have rented it out earlier.

If the owners are 'land hoarders', it could save you a chilling rejection at the door to know ahead of time.  

I tried to connect to city sewer but city rejected as sewer line very far and need to go through neighbors lot and also city main line is at very height positionI tried to sell 6 months back with one realtor.

Last time I did 1 year back got 4 credit cards about total 40k (which are expiring in few more months like 6 months) and 4 more credit card companies rejected.

I'm not a Realtor (any longer) and take this for what it's worth...but every time I've decided, as a seller, to reject a potential buyers offer as being too low, or insulting, or what ever re terms, my Realtor has always insisted that we sign a 'offer rejected ' just to make it legal, they would say.