A broker of record is the insurance professional officially authorized to act on your company's behalf with insurance carriers. Only one broker can hold this status with a given carrier for your account at any one time. The broker of record negotiates coverage terms, submits applications, receives quotes, and manages your policies. A signed broker of record letter is the legal document that establishes and transfers that authority.
Think of a broker of record like your registered agent: one designated person who has legal authority to act and receive information on your behalf.
A broker of record letter is a written authorization, typically one page, that designates a specific broker as your representative with a named insurance carrier. When you sign it and the insurer processes it, the new broker gains access to your policy details and the authority to negotiate on your behalf. Your previous broker loses both simultaneously. The insurance company notifies the outgoing broker within 24 to 48 hours of processing.
Most broker of record letters include a rescindment period of five to ten days. If you change your mind within that window, you can withdraw the letter and restore the prior relationship. Once the rescindment window closes, reversing the change requires a countermanding broker of record letter from the original broker.
Insurance companies operate on a first-contact rule: whichever broker approaches them first for your account controls access. If Broker A already has your account at Carrier X and Broker B contacts Carrier X independently, the carrier refuses to give Broker B any information or accept a competing application. This blocking mechanism is why the broker of record letter is not a formality. Your new broker literally cannot access that market for you without one.
This also means you should think carefully before signing a broker of record letter with a new broker just to get a quote. Signing it removes your current broker from that relationship immediately, even if you never end up switching coverage.
A broker of record letter grants broad authority: the broker can negotiate terms, request changes, submit applications, and represent you fully. A letter of authorization is narrower. It permits a specific person to settle a particular claim on your behalf but does not give them the right to negotiate policy terms or make coverage changes.
You can hold multiple broker of record relationships as long as each letter explicitly defines which coverage lines and which carriers fall within each broker's scope. One broker can manage employee benefits and a different broker can handle property and casualty, as long as both letters clearly specify which territory each covers.
Sources:
https://onpay.com/insights/what-is-a-broker-of-record/
https://hylant.com/insights/blog/broker-of-record-letter
https://thecoylegroup.com/broker-of-record-letters/
https://www.wallstreetmojo.com/broker-of-record/
https://ip.insure/what-is-a-broker-of-record/