Protection Periods and Procuring Cause: Who Really Earned the Commission?

Every commission dispute in real estate eventually arrives at one of two questions. The contractual one: does the protection period in the agreement capture this sale? And the equitable one: who was the procuring cause of this transaction? Agents who understand both doctrines draft agreements that prevent the disputes; agents who don't learn them later, in arbitration, from the losing side of the table.

Here is how commissions are actually earned under the law, how protection periods work and how to draft them, and how procuring cause is really decided when two agents claim the same check.

When Is a Commission "Earned"? The Ellsworth Dobbs Story

Start with the foundational question. The traditional common-law rule held that a listing broker earned the commission upon producing a ready, willing, and able buyer on the seller's terms — even if the sale never closed. Sign a contract with a qualified buyer, and the fee was owed; if the buyer later defaulted, the seller owed the commission anyway.

The New Jersey Supreme Court demolished that rule in Ellsworth Dobbs, Inc. v. Johnson, 50 N.J. 528 (1967), one of the most influential brokerage cases ever decided. The court held that, absent the seller's own default, a broker earns the commission only when the transaction is completed — when title passes. Making a seller pay a commission on a sale that collapsed because the buyer couldn't perform, the court reasoned, defies the parties' real expectations: sellers hire brokers to produce sales, not signatures. Many states followed by decision; in others, the closing-based trigger became universal through contract drafting. The practice point survives everywhere: your listing agreement should say exactly when the commission is earned and what happens on buyer default or seller default. (Our clause-by-clause listing agreement guide covers the drafting; the template is here.)

The Protection Period: The Tail That Saves the Fee

Now the contractual doctrine. A protection period (tail clause, extension clause, carryover clause) provides that if the listing expires and the seller afterward sells to a buyer introduced to the property during the listing term, the commission is still owed — typically for 30 to 180 days post-expiration.

The clause exists because of a specific, recurring species of bad faith: the seller who receives the broker's full marketing effort, meets an interested buyer at the broker's open house, then quietly waits for the listing to expire and closes directly, commission-free. Courts enforce well-drafted tails readily. The drafting elements that separate enforceable from unenforceable:

1. A defined trigger. "Sells to any person who was introduced to or shown the property during the term" — not "any person who becomes aware of the property," which is hopelessly vague.
2. A reasonable duration. 30–180 days is the enforceable mainstream; multi-year tails invite judicial trimming.
3. The registration list. The gold-standard mechanism: within X days after expiration, the broker delivers a written list of protected prospects. The tail applies only to listed names. This converts future factual warfare into a document.
4. The relist carve-out. The tail terminates (or subordinates) if the seller lists with a new broker — ensuring the seller never owes two commissions on one sale. Without this carve-out, some courts balk at enforcement; with it, the clause is nearly bulletproof.

Buyer-side agreements need the mirror-image tail: if the buyer purchases a property the agent introduced within X days after the buyer representation agreement expires, the fee is owed. Same elements, same logic, same registration-list discipline.

Procuring Cause: The Equitable Doctrine

Protection periods resolve broker-versus-seller fights. Procuring cause resolves broker-versus-broker fights — classically, two cooperating agents each claiming to have "earned" the buyer side of a closed sale.

The doctrine asks: whose efforts originated the uninterrupted chain of events that resulted in the sale? In NAR board arbitration — where most REALTOR® commission disputes land — hearing panels are instructed that no single factor is dispositive. Not who showed the house first, not who wrote the offer, not who attended the closing. Panels weigh the whole course of conduct: who introduced the buyer to the property, the nature and continuity of each broker's efforts, whether there was an abandonment or estrangement of the first relationship, whether the buyer acted in good faith, and the conduct of the agents toward each other.

The recurring fact patterns:

• The open-house jumper. Agent A shows the property; buyer later writes the offer with Agent B. If A's relationship was continuous and B inserted themselves, A has a strong claim. If the buyer genuinely abandoned A — unreturned calls, expressed dissatisfaction, a real break in the chain — B may prevail.
• The listing-agent sign call. Buyer calls the sign, sees the house with the listing agent, then brings in their own agent for the offer. Fact-intensive; the initial showing does not automatically win.
• The new-build registration. Builder policies requiring the agent to accompany or register the buyer on first visit regularly defeat later-arriving agents.

How the Settlement Era Changed the Fight

The post-2024 written-buyer-agreement regime did something quietly enormous to procuring cause: it papered the buyer relationship. When every tour requires a signed agreement, the question "whose client was this?" increasingly has a documentary answer. Agents working under signed exclusives with clear terms and protection periods rarely end up in classic procuring-cause brawls — the contract resolves what equity used to have to guess. That is one more reason the buyer agreement is the most underrated risk-management document in the business.

The Playbook

Drafting: definite commission triggers; a tail with registration list and relist carve-out in every listing; mirror-image tails in buyer agreements; delivery of the protected-prospect list calendared the day a listing expires.

Practice: get the buyer agreement signed before the first tour; document your work (showings, calls, offers drafted — contemporaneous records win arbitrations); never work someone else's exclusive client without addressing the existing agreement; and when a buyer arrives mid-stream from another agent, ask the uncomfortable question early.

Disputing: between REALTORS®, the path is board arbitration, where the panel weighs the whole chain of events. Walk in with a signed agreement, a protection list, and a showing log, and you have usually already won.

The Bottom Line

Commissions are earned by chains of events but awarded on paper. The protection period converts your marketing investment into a contractual right that survives expiration; procuring cause fills the gaps where paper runs out — expensively and unpredictably. Minimize the gaps: a listing agreement with a registration-list tail, a buyer representation agreement with its mirror, and a file full of dated records. Two dollars a template, instant download — against a five-figure fee decided by whichever story a panel believes.

Frequently Asked Questions

How long can a protection period legally run?

There is no universal statutory cap; enforceability turns on reasonableness. Thirty to 180 days is the defensible mainstream for residential listings; courts grow skeptical as tails stretch toward a year-plus, especially without a registration list limiting scope. The relist carve-out does more for enforceability than any duration choice — judges enforce tails that prevent bad faith, and trim tails that hold sellers hostage.

Does the protection period apply if the seller relists with another broker?

Under a well-drafted clause, the tail subordinates or terminates upon a bona fide relisting, so the seller never owes two commissions on one sale — the second listing's commission governs. What survives everywhere: the original tail against private sales to protected buyers, the maneuver the clause exists to prevent. A tail without the relist carve-out invites both a double-commission scenario and a court inclined to void it.

Who wins when a buyer attends my open house but writes the offer with their cousin, a licensee?

Fact-dependent — which is the honest answer to every procuring-cause question. One open-house visit rarely establishes an unbroken chain by itself; a continuous relationship (follow-up, additional showings, offer discussions) strengthens it enormously. The cousin's pre-existing relationship cuts the other way. In the settlement era, the decisive question is usually documentary: who had the signed buyer agreement before the tour?

Is procuring cause decided in court or arbitration?

Between REALTORS®, commission disputes generally must go to board arbitration under the Code of Ethics — panels of practitioners weighing the whole course of conduct, no single factor dispositive. Broker-versus-client disputes (tail enforcement against a seller) go to court on ordinary contract claims. The forums differ; the evidence that wins both is identical: signed agreements, prospect lists, dated showing logs.

Do protection periods exist in buyer representation agreements too?

They should — the mirror image: if the buyer purchases a property the agent introduced within X days after expiration, the fee is owed. The settlement era makes this clause more valuable, not less: with compensation negotiated deal-by-deal, a buyer who waits out the agreement and writes directly with the listing agent is cutting out a documented fee. Same drafting elements: defined trigger, reasonable duration, introduced-property list at termination.

What records actually win these disputes?

Contemporaneous, boring ones: the signed representation agreement pre-dating the first tour, MLS showing records, timestamped messages arranging visits, drafts of offers, and the registration list delivered at expiration. Panels believe paper with dates over memories with incentives. Build the file as you work (the full checklist) and most procuring-cause disputes end before they begin — usually in your favor, by phone.