Quick answer
A doctor's note for window tint is a signed statement from a licensed clinician, usually a physician and in some states an optometrist, saying that you or a regular passenger must be shielded from sunlight for a medical reason. What it must say, and whether the note alone is enough, depends on your state. In Texas, the signed statement kept in the vehicle is the proof. In Georgia and Missouri, the note is one part of an application, and the state issues the exemption or permit.
Key takeaways
- A note only counts if a licensed clinician evaluated you and signed it. A tint shop letter or a template you fill in yourself is not the same thing.
- Some states spell out the wording. Minnesota requires the statement to say whether the condition is temporary or permanent and the minimum light transmittance allowed.
- In Texas and the District of Columbia, the signed note kept in the vehicle is the proof. Texas treats medical need as a defense, so you can still be cited and show the note in court. Georgia and Missouri also require a state application or permit.
- Who may sign varies. Georgia's form asks for a Georgia license number and says physician assistants and nurse practitioners may not sign.
- ShadedMD physicians are licensed in your state, and approved patients receive a signed certificate by email for a flat $129.
What is a doctor's note for window tint?
Every state limits how dark car window tint can be. In states that offer a medical exemption, the starting point is a written statement from a licensed clinician saying you need protection from sunlight while you drive. People call it a doctor's note, a medical letter, a window tint prescription, an affidavit or a physician certificate. The name changes from state to state, but the job is the same: it documents that a qualified professional evaluated your condition and found a medical need for darker tint.
A note is not a permission slip that works everywhere. Your state sets the rules, including who may sign, what the note must say, how dark you may go and whether you also need a state form. A few states have no medical exemption for darker tint at all. See the states with no medical tint exemption before you ask a doctor for anything.
What does a doctor's note for window tint need to say?
Wording varies, but a note that will hold up generally includes:
- Your full name, or the name of the regular passenger who needs the protection
- A statement that, in the clinician's professional opinion, the person must be shielded from sunlight or bright light for a medical reason
- The clinician's name, license number, signature and the date
- Any details your state requires, such as a minimum light transmission percentage, whether the condition is temporary or permanent, or an expiration date
Here is what four states and the District of Columbia ask for, based on their official pages:
| State | Who can sign | What the note must say | Is the note enough? |
|---|---|---|---|
| Texas | A licensed physician or licensed optometrist | Identify the driver or occupant with reasonable specificity, and state that in the professional's opinion the tint is necessary to safeguard that person's health | Yes. Texas DPS stopped issuing exemption certificates on January 1, 2019, and says the signed statement serves as proof of a medical exception. Texas treats medical need as a defense to prosecution, so an officer can still write a citation. The note is what you show the officer and, if you are cited, the court. |
| Minnesota | A physician, and under a 2026 law, an optometrist for prescriptions issued on or after July 1, 2025 | Whether the condition is temporary or permanent, the minimum percentage light transmittance may be reduced to, and an expiration date no more than 2 years out unless the condition is permanent | The statute requires the driver or a passenger to have the prescription or statement. It describes no state application. |
| Missouri | A physician | Issued within the past year, in the vehicle owner's name, stating the serious medical condition and the specific tint percentage needed | No. You bring the tinted vehicle and the prescription to a Highway Patrol troop headquarters, which issues a permit, a windshield sticker and a rear decal. |
| Georgia | A Georgia-licensed physician or optometrist, who attests on the form to having personally examined you. Physician assistants, nurse practitioners and nurses may not sign the form. | A letter explaining why your condition can only be addressed by reducing visible light, not ultraviolet light. Conditions that protective eyewear or legal tint blocking 99.9% of UV can address are not eligible, and neither are conditions that may occur due to family history. | No. The letter goes with form DPS-431 and a $10 fee to the Department of Public Safety. The approved copy is your exemption. |
| District of Columbia | A physician, physician assistant, ophthalmologist or optometrist | On letterhead, certifying that protection from sunlight or bright lights is necessary because of a medical condition of the registered owner or a household member | DC DMV describes keeping the signed letter in the vehicle and lists no form. |
Rules change, so check your state's page for the current requirements before you tint.
Who can sign a doctor's note for window tint?
A licensed physician is the most widely accepted signer. Beyond that, the list varies. Texas, Georgia and the District of Columbia accept optometrists, and Minnesota added them in 2026. The District of Columbia also accepts physician assistants, while Georgia's form expressly bars physician assistants, nurse practitioners and nurses from signing.
Where the signer is licensed matters too. Many states expect the clinician to hold a license in that state. Georgia's form, for example, asks for the physician's or optometrist's Georgia license number. A note from a doctor you saw before you moved may not be accepted in your new state.
Can a doctor prescribe window tint? In a sense. A clinician cannot change your state's tint law, but where a medical exemption exists, their signed statement is what unlocks it. Some states even call it a prescription: the Missouri State Highway Patrol asks for a physician's prescription that states the tint percentage needed, and Minnesota's law refers to a prescription or a statement of medical need.
Is a doctor's note enough by itself?
It depends on how your state's exemption works. Broadly, there are two models:
- Carry the note. The signed statement is the proof, and you keep it in the vehicle to show an officer. Texas and the District of Columbia work this way, based on their official pages.
- Apply with the note. The note supports an application, and the state issues the exemption, permit, sticker or decal. Georgia (form DPS-431) and Missouri (a Highway Patrol permit) work this way.
Even where the note is enough, keep it with you. An officer cannot see your medical paperwork through the glass, and a note left at home does not help at a traffic stop. Our guide to traffic stops, inspections and travel covers what to do if you are pulled over. For states with their own paperwork, see states that require a DMV form.
What about tint shop letters and templates?
Some tint shops hand out a generic medical letter, and some websites offer fill-in templates. Neither replaces a real evaluation. The rules above all assume that a licensed clinician evaluated you and decided you need the tint. We cover this in detail in tint shop letters vs. a physician certificate.
How do you get a doctor's note for window tint online?
If your own doctor is not familiar with tint paperwork, or you cannot wait weeks for an appointment, ShadedMD handles the medical evaluation online. You choose your state and answer a 5-minute questionnaire. A physician licensed in your state reviews it, and physicians aim to finish reviews within 24 to 48 hours. If you are approved, a signed certificate is emailed to you with a one-year date and guidance for any state form.
ShadedMD charges one flat $129, the best pricing of any online tint exemption service, with a 30-day money-back guarantee if you are not approved. See if you qualify.
Before you start, check window tint laws by state to see the standard limits and whether your state offers a medical exemption. Some states ask for more than a signed certificate. Georgia's form has the signer attest to a personal examination, Minnesota and Missouri expect the note to state a tint percentage, and other states use their own form. Your state page explains what applies. This article is general information, not medical or legal advice.
Frequently asked questions
Can a doctor prescribe window tint?
A doctor cannot override your state's tint law, but in states that offer a medical exemption, a licensed physician, and in some states an optometrist, can certify that you need darker tint for a medical reason. Some states call this a prescription. Missouri, for example, asks for a physician's prescription that states the specific tint percentage needed.
Can a nurse practitioner or physician assistant sign a window tint note?
It depends on the state. The District of Columbia DMV accepts a letter from a physician assistant, while Georgia's application says physician assistants, nurse practitioners and nurses may not sign. Check your state's rules before you ask for a note.
Does a doctor's note for window tint expire?
Often, yes. Minnesota statements expire within 2 years unless the condition is permanent, Missouri asks for a prescription issued within the past year, and a Georgia exemption is valid for 4 years from approval. The ShadedMD certificate carries a one-year date.
Is a doctor's note from another state valid?
Not always. Many states expect the signer to be licensed in that state; Georgia's form, for example, asks for a Georgia license number. Get your note from a clinician licensed where your vehicle is registered. ShadedMD matches you with a physician licensed in your state.
Sources
- Texas Department of Public Safety, Window Tinting Standards
- Minnesota Statutes section 169.71, subdivision 4a (Minnesota Office of the Revisor of Statutes)
- 2026 Minnesota Session Laws, chapter 89 (S.F. 3637), adding optometrists to the tint medical exemption
- Missouri State Highway Patrol, Window Tinting: What's Legal? (SHP-510, 9/2025)
- Georgia Department of Public Safety, Application for Exemption to the Window Tint Law (DPS-431, Rev. 3/2026)
- DC Department of Motor Vehicles, Medical Waivers for Vehicle Window Tinting Restrictions
This article is general information, not medical or legal advice. Tint laws change and differ by state, so check your state's current rules. Whether you qualify for an exemption is decided by a licensed physician based on your individual condition.
About ShadedMD
Medical tint exemptions you can trust
ShadedMD is an online medical window tint exemption service. Every questionnaire is reviewed by a physician licensed in your state, who approves or denies it based on medical need. ShadedMD offers the best pricing of any online tint exemption service: one flat fee of $129 with no add-ons, backed by a 30-day money-back guarantee. Physicians aim to complete reviews within 24 to 48 hours, and approved patients receive a signed certificate by email that they can download, print, and keep for one year.