I've used  tax assessment , google, zabasearch, white pages I have a lead on multiple properties that are owned by the same individual but I just can't get a current address.

Is there anything I can record to protect the contract we have to prevent him from entering into a contract with another buyer at a higher price? 

Many transactions are hammered quietly too, do this or else and the accused party does that instead of getting hammered publicly.Ethics is not what an individual might define for themselves, it is a standard of conduct accepted in an industry that allows limited deviations from the norm.

The same building around the corner was turned into condos and sold individually.

Thank you.I should have mentioned: The property has four, small, individual offices (about 100 sq.ft each).

By choosing to enter the country illegally, they have already set themselves outside the law.With that said, most of the Hispanic immigrants I've encountered - legal and illegal - have a distrust of the banks, officials, etc.  

entity planning is very specific for each individual.

Is this a new win for individual rights?

The Notice to Quit is what ends the prior tenancy so you can start a new one with your higher rent.You must give the tenant the option of entering  into a new lease at the higher rent amount.

There you can enter your zip code to find other Bigger Pockets members near you.