Letter of Protection: What It Is, How It Works, and the Risks
Direct Answer
A letter of protection (LOP) is a letter from a personal injury attorney to a medical provider promising that the provider's bill will be paid out of the eventual settlement or judgment in the client's case. It lets an injured person get treatment now, without health insurance and without paying up front, while the provider holds the billing until the case resolves. The trade-off: the patient remains personally responsible for the bill if the case is lost, and LOP charges often run above insurance rates.
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What Is a Letter of Protection?
The plain meaning of a letter of protection is a payment guarantee tied to a lawsuit. It is a short letter, signed by the injured person's attorney and acknowledged by the client, telling a doctor, surgeon, imaging center, or therapy clinic: treat my client now, hold your billing, and your reasonable charges will be protected, meaning paid out of whatever settlement or judgment the case produces, before the client receives their share.
The letter exists to solve a timing problem. Personal injury care is needed immediately, but the money that pays for it arrives only when the claim resolves, often a year or more later. For claimants without health insurance, with an insurer that refuses accident-related care, or who need a specialist outside their network, the LOP bridges that gap. The provider extends credit against the case; the attorney administers the payment at the end.
A letter of protection is not court-issued, not a statute-prescribed form, and not an insurance product. It is a private credit arrangement among three parties: the patient, the treating provider, and the attorney whose signature gives the promise weight. That is also why its risks fall on the patient, as covered below.
How a Letter of Protection Works
Four steps, start to finish. The attorney opens the arrangement, the provider carries the account, and the settlement closes it out. The accrued LOP charges also become part of the medical specials cited in the personal injury demand letter that drives the negotiation.
- 1
The attorney sends the letter of protection
The injured person's attorney sends a signed letter to the treating provider identifying the client, the claim, and the promise: the provider's reasonable charges will be protected and paid out of any settlement or judgment before funds are disbursed to the client.
- 2
The provider treats and holds the billing
The provider delivers the care, surgery, imaging, injections, physical therapy, without demanding payment up front and without billing health insurance. The account is flagged to the LOP and accrues until the case resolves.
- 3
The case is worked up and resolved
The attorney assembles the liability and damages record, sends the demand letter to the carrier, and negotiates. The LOP charges become part of the medical specials that support the demand figure.
- 4
The provider is paid at settlement, before the client
When the case settles or a judgment is collected, the attorney pays the LOP provider from the proceeds at disbursement, before the client receives the net recovery. Attorneys often negotiate LOP balances down at this stage to improve the client's net.
Wondering how LOP charges feed into case value? The multiplier method builds pain and suffering on top of medical specials. Run the numbers in our personal injury settlement calculator, and estimate what a contingency fee and LOP repayment leave you with in our personal injury lawyer fee calculator.
Letter of Protection in Florida
Letters of protection are especially common in Florida personal injury practice. A large share of Florida claimants treat with orthopedic, pain-management, and imaging providers under LOPs, and many Florida provider groups have built their intake around attorney referrals and protected billing.
Because the arrangement is so widespread, Florida litigation has focused heavily on LOP transparency. Florida law has addressed disclosure of letters of protection and related billing arrangements in litigation, and Florida defendants routinely seek discovery into referral relationships between law firms and LOP providers, arguing that a provider awaiting payment from the verdict has a financial interest in the outcome. If you treat under an LOP in Florida, assume the defense will see the arrangement and be prepared for your treating provider's billing to be scrutinized for reasonableness.
None of this makes an LOP improper in Florida. It remains a legitimate and often necessary way for uninsured claimants to get care. It does mean the arrangement should be documented cleanly, charges should be defensible against market rates, and the demand package should anticipate the bias argument rather than be surprised by it.
Letter of Protection in Texas
Texas is the other state where letters of protection are a fixture of injury practice. Texas claimants without health coverage, or whose carriers will not pay for accident care, routinely treat with surgeons and pain-management providers under LOPs while their auto or premises claims are worked up.
Texas defense practice treats LOP billing as a trial issue. Defendants probe whether the amounts charged under a letter of protection are reasonable compared with what insurers or government payers would have paid for the same care, and they argue that a provider whose payment depends on the plaintiff winning is a biased witness. Texas courts have allowed defendants meaningful latitude to explore these arrangements, so LOP-heavy damages models get tested rather than taken at face value.
The practical takeaway for a Texas claimant is the same as in Florida: the LOP is a financing tool, not a damages multiplier. Keep the charges defensible, keep the paper trail clean, and build the demand on the treatment record rather than on the size of the accrued balance.
Risks and Downsides of a Letter of Protection
An LOP moves risk onto the patient. All four of the downsides below flow from the same fact: the provider is extending credit against a case that might not pay.
You owe the bill if the case fails
The debt is deferred, not forgiven. If the case is lost, abandoned, or settles too low, the provider bills you directly for the full accrued charges and can pursue collections, subject to state law.
Charges can exceed insurance rates
LOP billing is typically at full list rates rather than insurer-negotiated rates. The same MRI or injection series can cost several times what a health plan would have paid, and the difference comes out of your recovery.
Defense bias attacks at trial
Defense counsel may argue that an LOP provider has a direct financial stake in your verdict and is therefore an interested witness, and may attack the reasonableness of LOP charges. This can reduce the damages a jury credits.
A smaller net recovery
Every LOP dollar is paid from the settlement before you are. Large accrued LOP balances, especially at list rates, can consume a disproportionate share of the recovery and leave you with less than the headline settlement suggests.
A hypothetical to make the net-recovery risk concrete. Suppose your case settles for $60,000, your attorney's contingency fee is a third, and your LOP provider has accrued $25,000 in list-rate charges. The fee takes $20,000 and the LOP takes $25,000 before you see anything, leaving you $15,000. Had health insurance paid a negotiated $9,000 for the same care, your net would have been substantially higher even after repaying the insurer. The numbers are illustrative, but the mechanics are exactly how disbursement works.
Letter of Protection vs Medical Lien vs Health Insurance
Three ways to pay for injury treatment before the case resolves. The right choice is case-specific: coverage status, provider willingness, and state lien law all factor in.
| Letter of Protection | Medical Lien | Health Insurance | |
|---|---|---|---|
| What it is | Attorney's written promise to pay the provider from the recovery | Legal claim that attaches to the settlement funds by statute, contract, or filing | Third-party payer covers care at negotiated rates as it is delivered |
| Who bears the risk | Patient remains personally liable if the case fails | Lienholder is paid from proceeds; patient often still liable on the underlying bill | Insurer pays regardless of case outcome; subrogation may claim reimbursement |
| Billing rates | Often full list rates, frequently above insurer rates | Varies; hospital lien statutes may regulate amounts in some states | Negotiated network rates, usually the lowest of the three |
| Effect on your net recovery | Paid at disbursement before you; balances often negotiable | Must be resolved before disbursement; some statutes cap lien amounts | Subrogation or reimbursement claims repaid from recovery, usually at reduced rates |
| Best suited for | Uninsured or underinsured claimants who need care now | Hospital and facility charges in states with lien statutes | Anyone with coverage that will pay for the accident-related care |
Who Sends a Letter of Protection and What It Contains
The letter is sent by the injured person's attorney, on firm letterhead, to each provider who will treat under the arrangement. Providers generally will not accept an LOP signed only by the patient; the attorney's signature is what gives the promise credibility, because the attorney controls the settlement disbursement. The client signs or countersigns to acknowledge continuing personal responsibility for the bill.
A complete letter of protection typically contains:
- Identification of the client, the date of injury, and the pending claim or case number
- The attorney's representation statement confirming an active personal injury claim
- The protection promise: the provider's reasonable and necessary charges will be paid from any settlement or judgment before disbursement to the client
- The client's acknowledgment of continuing personal responsibility for the bill regardless of outcome
- Scope language identifying which treatment, providers, or date ranges the letter covers
- Instructions for the provider to send itemized billing and records to the attorney's office
When the treatment finishes and the record is complete, the accrued charges flow into the settlement demand. That letter, the demand to the carrier, is the document that actually converts the LOP-funded treatment into money.
Letter of Protection Questions
Common questions about how letters of protection work, who pays, and what happens if the case is lost.
What is a letter of protection in a personal injury case?
Is a letter of protection legally binding?
Who pays the medical bills under a letter of protection if I lose my case?
Do letters of protection make medical bills higher?
Can the defense find out about my letter of protection?
Is a letter of protection the same as a medical lien?
Should I use my health insurance instead of a letter of protection?
Does a letter of protection guarantee the provider gets paid?
Treated Under an LOP? The Demand Letter Is What Gets It Paid
A letter of protection only works if the case resolves well, and the case resolves on the strength of the demand package. Our attorneys draft personal injury demand letters for a flat fee: liability narrative, itemized specials including LOP charges, pain and suffering calculation, and a deadline the carrier takes seriously. You send it, or your trial counsel does.