No Forwarding Address vs. Security Deposit

[Lacey A.]

We had a tenant just vacate without leaving a forwarding address. They also didn't even attempt to clean and have exhausted their security deposit to the extent that they owe us money. They owe $2500 more than their security deposit. We have their email, and phone number. Clearly didn't leave on good terms, which is undesirable. :/ 

What would you do? 

A) Good riddance and cut your losses? 

B) Document and send them an invoice knowing it could go unpaid? 

C) Option B + take legal action? 

D) Other