A certified weight certificate is a signed document from a government-inspected scale that records your vehicle’s exact weight, and getting one is usually a ten-minute errand at a truck stop that costs about $15. The CAT Scale network, the largest public scale operator in North America, charges $14.75 for a first weigh and $5.00 for a reweigh of the same vehicle at the same location within 24 hours.1CAT Scale. FAQ2CAT Scale. What Is CAT Scale’s Reweigh Policy? The ticket you walk out with is what the DMV, your branch of service, or a highway enforcement officer will accept as proof of weight.
Where To Get One
Truck stops are the easiest option. CAT Scale and other truck stop operators keep public scales open long hours and charge consistent rates. Outside of truck stops, grain elevators, recycling centers, and moving companies often maintain certified scales open to the public, though rural areas can be thin on options. Call ahead to confirm hours and public access.
Before you pay, look for a current inspection sticker or lead-wire seal from the state weights and measures division on the scale housing. That marking tells you the scale has been tested and approved for commercial transactions. If you don’t see one, ask the operator when the scale was last inspected. A reading from an uncertified scale will not satisfy an agency that requires a certified weight.
What To Bring
Have three things on hand before you pull onto the platform:
- Your vehicle identification number (VIN)
- Your current license plate number
- A valid driver’s license
The operator records all three on the certificate. If any of them is missing or wrong, the document may be rejected by whoever asked for it.
Decide in advance which weight you need, because the terminology on the ticket matters:
- Tare weight is the vehicle empty, with no cargo or passengers.
- Gross weight is the loaded vehicle, total.
- Net weight is the difference between the two — the cargo alone.
- Axle weight is the load on each axle or axle group, which matters for highway compliance and some registrations.
Most situations call for both a tare and a gross reading so net cargo can be calculated. Tell the operator what the certificate is for before you weigh. Military moves, commercial trucking, and some DMV registrations have different formatting expectations, and the operator can adjust the paperwork accordingly.
What Happens on the Scale
Pull slowly onto the platform with every wheel squarely on the surface. Many facilities use signal lights: red to stop, green to proceed. Once you’re stationary, the weighmaster speaks through an intercom or window to confirm your details and lock in the reading. A straightforward gross or tare weigh takes about two minutes. You pay at the window or through an app, and the operator hands you a printed certificate showing the date, time, weight, vehicle identification, and the weighmaster’s signature.
Keep the original somewhere safe. A replacement means paying for another weigh.
Getting Axle-by-Axle Weights
If you need individual axle readings, say so up front. Some platforms are segmented and can read each axle group at once. On the CAT Scale network, drivers can request a spread-axle weigh through the Weigh My Truck app, which captures each axle group’s weight as you slowly roll off the platform. The resulting ticket breaks weights out across the steer axle, drive axles, and trailer axles.3CAT Scale. Spread-Axle Weighing Now Available Through CAT Scale’s Weigh My Truck App
Digital Versus Paper Tickets
Paper is still the standard. Some scale networks now email a locked PDF after the transaction, and a growing number of jurisdictions accept electronic certificates. Confirm acceptance before you submit a digital version. Military personally procured move offices in particular may still require the original printed ticket.
When You’ll Need One
Military Personally Procured Moves
Service members who move their own household goods are reimbursed based on verified weight, and the rules are stricter than a standard commercial weigh. You need two certified weight tickets for each vehicle: one empty (tare) and one loaded (gross), both signed by the weighmaster.4NAVSUP. Conducting a NAVY Personally Procured Move (PPM) A few details regularly trip people up:
- Everyone except the driver must exit the vehicle for both weighings.
- Keep fuel consistent. Fill the tank before both weighings, or if you weigh empty first, don’t add fuel before the loaded weigh.
- If you’re towing a personal vehicle behind a rental truck, disconnect it before you step on the scale.
Reimbursement is calculated on the net weight of your goods or your rank-based authorized allowance, whichever is less.5Defense Travel Management Office. Joint Travel Regulations (JTR) Without proper tickets, the military may fall back on a constructed weight estimate that almost always pays less. File the originals with your travel claim.
Commercial Trucking and Highway Limits
Federal law caps the weight of vehicles on the Interstate Highway System at 20,000 pounds on any single axle, 34,000 pounds on a tandem axle, and 80,000 pounds gross for combinations of five or more axles. Vehicles powered primarily by natural gas or electric batteries get a 2,000-pound allowance on the power unit, raising their maximum gross to 82,000 pounds.6Office of the Law Revision Counsel. 23 USC 127 Vehicle Weight Limitations-Interstate System A separate federal bridge formula can further restrict what’s allowed on a given axle group based on spacing, which is why axle-by-axle tickets matter for trucking operations.7Federal Highway Administration. Bridge Formula Weights A truck can be under 80,000 pounds gross and still be in violation if one axle group carries too much.
Overweight fines escalate quickly. States set their own schedules, but the pattern is consistent: a small overage might cost under $200, while being 10,000 pounds over can run into the thousands, usually with court costs and administrative fees roughly doubling the base fine. Penalties apply to gross or axle weight, whichever produces the larger fine. Repeat violations within a year can lead to registration or license suspension.
Vehicle Registration and Other Uses
Some DMV offices require a certified weight for registering commercial trucks, trailers, or modified vehicles, and shipping and freight disputes often turn on a certified reading. Ask the requesting agency which weight types they need (tare, gross, net, axle) and whether a digital ticket is acceptable before you drive to the scale.
What Makes the Certificate “Certified”
Every public scale in the country is built and tested to the specifications in NIST Handbook 44, published by the National Institute of Standards and Technology.8National Institute of Standards and Technology. 2025 NIST Handbook 44 State weights and measures inspectors test each scale with certified test weights across its full range. When a scale passes, the inspector applies a dated sticker or a lead-wire seal to the equipment. The seal both signals approval and reveals tampering if the housing is opened without authorization. Operating a public scale without current certification exposes the business to fines, civil penalties, and permit suspension.
The weighmaster matters too. Most states require the operator to hold an active, annually renewed license and seal, so a specific individual is accountable for every signed ticket.
Don’t Alter the Ticket
Falsifying a weight certificate is a criminal matter, not just a regulatory one. In the livestock and meatpacking context, the Packers and Stockyards Act carries civil penalties up to $28,061 per violation and criminal fines of $1,000 to $5,000, up to three years in prison, or both, for knowingly printing a false weight, altering records, or blocking an authorized inspection.9Agricultural Marketing Service. Responsibility for Accurate Scales and Livestock Weights Outside that industry, state fraud and forgery laws cover falsified weight certificates. If a ticket has your name on it, it needs to show what the scale actually read.