"Best effort" seems a very vague and ambiguous phrase
No it not,its very clear if he has any proof that he advertised,paid or free ads anywhere online etc or even a picture of a poster on a street pole or any noticeboard should suffice,I love home made lawyers like you coming to court with such idiot excuses and end up paying.
comeback to this country even if its after 6 7 months you know
Usually the Polish landlords are just talk to scare a foreigner as for in the States I would make sure I get the judgement depending on your age,which is good for 20 years and then renew it and wish you have any asset.I did collect couple times like that and still have judgments against people for over 200k,yes its just a paper yet but you never know,as people tend to forget with time and start investing lol and you jump in to cash or you can sell the judgments for 15/20% of the value,I use to sell judgments but now I keep them.Here is the firm who buys judgments in NJ dnb.com/business-directory/company-profiles.pressler__pressler_llp.7dcf24d61a85dd0ecd9a80889a7cfee2.html