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

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.

An agency works your account for a share of what it recovers and returns what it cannot collect - you keep ownership of the debt. A debt buyer purchases the account outright, usually for cents on the dollar, and keeps everything it recovers. For unpaid B2B invoices where the customer relationship may be salvageable, the agency model is normally what businesses want.

It depends on the state - 31 jurisdictions require a licence or registration, Texas requires only a $10,000 bond filed with the Secretary of State, and the rest require neither. The rule that surprises creditors is that several states look at where the debtor is located, so a multi-state ledger can require an agency licensed in states you never thought about.

Normalize three things: the commission ladder by account age, what happens to the rate after attorney forwarding, and remittance timing. Then verify licensing in your debtors' states and place a test batch rather than the whole ledger. Recovery against the quoted ladder tells you more in one cycle than any sales conversation.

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.