The state rule, the city rule, and the one that follows your debtor

It can, which is why how an agency communicates matters as much as its rate. Ask about contact frequency, tone, dispute handling, and whether early-stage work is done as reminders under your name before escalation. Many agencies offer a softer pre-collection product for exactly this reason.

Sometimes - it depends on your contract and state law. Where your terms and conditions provide for collection costs and interest, and the applicable state permits it, those amounts may be added to the claim. That clause is worth having in your standard terms before you need it; ask your counsel to review it.

Statutes of limitation are state law and commonly run 3-6 years for commercial obligations, varying by whether the debt rests on a written contract, an open account or an oral agreement. In many states a partial payment or written acknowledgement can restart the clock - which is worth knowing before agreeing to a payment plan on a very old balance.

In some states, more than you would expect. Washington's statute bars an unlicensed agency from bringing or maintaining a collection action in that state's courts - so a licensing gap can make an otherwise collectable account unenforceable there. There is no nationwide rule making debts void, and this site does not claim one; check your state's page and verify licensing before placing.

No. The Fair Debt Collection Practices Act defines 'debt' as an obligation of a consumer arising out of a transaction primarily for personal, family or household purposes - business-to-business obligations fall outside the statute entirely. That does not mean B2B collection is unregulated: state collection statutes, phone-consent rules, contract terms and ordinary law still apply.