Your FAA drone registration number goes on an external surface of the aircraft, somewhere it can be read without opening a hatch, removing a battery, or using tools. Federal rules don’t name a specific spot, so where to put your drone registration number is up to you as long as the marking is visible during a simple look at the exterior and stays legible for the whole flight.1eCFR. 14 CFR 48.205 – Display and Location of Unique Identifier
Picking a Spot on the Drone
The top or side of the main body is the most common choice. It stays visible when the drone is on the ground and when someone is inspecting it up close. The arms that hold the propellers also work. The test is whether someone can read the number without flipping the aircraft over, peeling off panels, or otherwise handling it.2Federal Aviation Administration. FAA Makes Major Drone ID Marking Change
A few things to steer clear of:
- Removable parts. A battery door, a propeller guard you sometimes leave off, or a payload mount can detach or break away in a crash and take your registration number with it.
- Sensor areas. Labels placed over downward-facing vision sensors, obstacle-avoidance cameras, or GPS antennas can interfere with flight performance.
- Anything too small to read. The FAA doesn’t set a minimum character height, but the number must be legible under normal conditions. If someone standing a few feet away can’t read it, it’s too small.1eCFR. 14 CFR 48.205 – Display and Location of Unique Identifier
How to Actually Put It On
The FAA doesn’t require a particular method. The rule says only that the identifier must be legible and stay attached throughout the flight.1eCFR. 14 CFR 48.205 – Display and Location of Unique Identifier Three approaches are common.
Permanent marker is the cheapest. It works well on light-colored shells; on a dark drone body a fine-tip marker can be hard to read, so match the ink to the surface.
Adhesive labels, whether printed or run off a label maker, look clean and stay readable in the field. If you fly in wet or dusty conditions, use a weatherproof or laminated label.
Engraving is the most durable. A rotary tool can etch the number into the plastic shell so it won’t fade or peel. It’s harder to undo if you sell the drone later.
Whichever method you pick, check it every so often. Marker ink fades in sunlight, sticker adhesive gives up in heat, and engravings can fill with grime until they’re unreadable. Putting the number on once isn’t the whole obligation; keeping it legible is.
Why the Rule Requires an External Spot
When drone registration started in 2015, the number could sit inside a battery compartment. That changed on February 25, 2019, when an interim final rule made external display mandatory.3Federal Register. External Marking Requirement for Small Unmanned Aircraft The Department of Homeland Security pushed for the change so that a law enforcement officer or first responder finding an unidentified drone wouldn’t have to open compartments on an aircraft that might carry hazardous material. External marking lets anyone read the number from a safe distance.2Federal Aviation Administration. FAA Makes Major Drone ID Marking Change
Do You Even Need to Register
Not every drone requires registration. The weight threshold is 0.55 pounds (250 grams), including anything attached like a camera or propeller guards. Fly at or under that weight for recreation only, and you’re exempt.4Federal Aviation Administration. How to Register Your Drone
The exemption disappears the moment you fly commercially. Under Part 107, which governs business and professional operations, all drones must be registered regardless of weight. The weight exception applies only to aircraft flown under the Exception for Limited Recreational Operations.4Federal Aviation Administration. How to Register Your Drone A 200-gram drone used for real estate photography still needs a registration number on its exterior.
One Number or One Per Drone
How you mark a fleet depends on which path you’re on. Recreational registration costs $5 and covers every drone you own under a single number, so every recreational aircraft you fly gets the same marking. Part 107 registration also costs $5 but applies per drone, so each commercial aircraft has its own unique number and its own marking.4Federal Aviation Administration. How to Register Your Drone
Remote ID Doesn’t Replace the Sticker
Since September 16, 2023, most operators must also comply with Remote ID, which requires the drone to electronically broadcast identification and location data during flight.5eCFR. 14 CFR Part 89 – Remote Identification of Unmanned Aircraft It functions like a digital license plate transmitting position, altitude, speed, and an identifier in real time.
Remote ID does not replace the physical registration number on the drone’s exterior. You need both. The physical marking covers situations where the drone is powered off, damaged, or recovered after a crash and can’t broadcast anything. The only exception to the Remote ID requirement is flying within an FAA-Recognized Identification Area, a designated space where drones without Remote ID capability can still operate.
What Happens If You Skip It
Flying a drone that should be registered but isn’t, or flying without the registration number properly displayed, can result in civil penalties up to $27,500. Criminal penalties go further: fines up to $250,000 and up to three years in prison.6Federal Aviation Administration. Is There a Penalty for Failing to Register? Criminal prosecution is reserved for the most serious cases, but the civil range alone makes the point. Two minutes with a marker or a label is a lot cheaper than the alternative.