Tenant Mailing Address

[Benjamin Morris]

Have a tenant in CT whose lease lapsed October 31st, they remained in possession until November 10th, who refuses to provide me with a mailing address to meet my obligations of mailing a letter outlining what money I've retained towards their security deposit. They actually did a bit of damage (estimated @ $2000), owe for the 10 days overage, thus I intend to keep the whole deposit and bill them the excess. Wanting to bring them to small claims court, but because I don't have a mailing address for them I can't initiate a claim. I originally dropped any intention of pursuing this claim as they have been unemployed for the past few years (alimony support + children were helping them out), but a few days ago received a letter from their attorney requesting I mail the attorney a check for the remaining security deposit. Thoughts of via this letter mailing the small claims request to the attorneys office? 

I interpret the letter as requesting all communications going through his office. Looking forward to your thoughts / opinions of why this would or wouldn't work. 

Thanks,