A creditor doesn't need your permission to send their claim to a collection bureau. Frankly, I don't see sending an account to collections as much of a threat because typically the collector will send you a letter asking if you dispute the debt and when you reply that you do, they will drop it. If this matter should show up on your credit report, you can dispute the claim and have it removed from there as well. Hope this perspective helps!
Agree with Attorney Bunce. You may have some remedies in what stands for a landlord/tenant court in KS (not in WA), but I don't see the benefit for you. Dispute it if it goes to collections, dispute it if it shows up on your credit report.