How to Read a Recall Notice: Lot Numbers, UPCs, and Date Codes Explained

When a manufacturer or government agency identifies a safety problem, it is almost always traced to a specific production run — a particular batch made on a particular day in a particular facility. A food company might produce 50,000 cases of salsa per week. If contamination is found in one production run, the recall covers only those specific cases, not the entire product line.

This specificity is intentional and consumer-protective, even if it makes recalls harder to act on quickly. Blanket recalls of entire product lines would waste enormous amounts of safe food and cost manufacturers and insurers billions. The tradeoff is that consumers have to do a bit of detective work to determine whether their specific product is affected.

Understanding what each type of identifier means and where to find it on your product is the only way to know for certain whether you need to act.

A lot number (also called a lot code, batch number, or production code) identifies a specific manufacturing batch. For food products, lot numbers are usually printed or embossed on the packaging — often on the bottom of a can, the side crimp of a bag, or the end flap of a cardboard box. They may also appear near the best-by date.

Lot numbers are not standardized across manufacturers. A lot number might look like "A4358B2," "LOT 24358," or just a series of digits with no label at all. The recall notice will show you exactly what the affected lot numbers look like — including any prefixes, dashes, or letter codes that are part of the identifier.

If a recall lists multiple lot numbers, check your product against each one. Sometimes a recall covers a range (for example, all lots beginning with "L24" through "L31"), and the notice will explain how to read the range.

If your product has a lot number not listed in the recall, it is not affected by that specific recall — even if it is the same product from the same brand. Keep it. You do not need to throw away food that matches the brand but not the specific lot.

A Universal Product Code (UPC) is the 12-digit number printed below the barcode on most packaged food and consumer products. In recalls, UPC codes are used to narrow down which specific SKUs (individual product variants) are affected. A manufacturer may sell a product in multiple package sizes — 8 oz, 16 oz, and 32 oz — each with a different UPC, and only one size might be recalled.

To read a UPC, look for the number printed beneath the vertical bars of the barcode. The number typically starts with a manufacturer prefix, followed by a product code, and ends with a check digit. You do not need to decode the structure — just match the full 12-digit number against what is listed in the recall notice.

Some recall notices list UPCs with leading zeros that may not appear on older packaging. If the notice shows "00012345678901" and your package shows "12345678901," these are the same number — the leading zeros are sometimes added for electronic data systems.

Best-by and use-by dates are not safety guarantees on their own, but they are frequently used in recall notices to narrow down the affected production window. If a recall covers products with a best-by date of January 15 through March 22, 2025, a product with a best-by date of March 23 is not included — even if the lot number is otherwise similar.

Date code formats vary by manufacturer. Common formats include MM/DD/YY, DD/MM/YY, and YYYYMMDD. If you cannot determine the format from the date alone, look at the recall notice — it will typically spell out the format explicitly ("best by JAN 15 2025") to avoid ambiguity.

Some products use Julian dates, which represent the day of the year as a number from 001 to 365. A Julian date of "026" means the 26th day of the year, or January 26. Julian dates are more common on commercial and institutional packaging than consumer retail packaging, but they do appear occasionally.

When both a lot number and a best-by date are listed in a recall, both must match for your product to be affected. A product with the right lot number but the wrong date, or vice versa, is generally not included.

For consumer products — electronics, appliances, furniture, toys, and similar items — recalls use model numbers and, in some cases, serial numbers to identify affected units. Model numbers identify a product design or configuration; serial numbers identify a specific individual unit.

Model numbers are typically found on a label on the back or bottom of a product, in the product's settings or about screen, or in the original documentation. For large appliances, the label is often inside a door or drawer. For power tools, it is usually on the housing near the motor.

Serial numbers narrow recalls further when only certain production runs of a model are affected. A recall might cover a specific model but only units with serial numbers in a given range — for example, "Model XR-200, serial numbers 1000000 through 1249999." Units outside the serial number range are not recalled, even if they are the same model.

When a CPSC product recall notice lists a model number, you can also look it up directly at SaferProducts.gov. The recall page usually includes photos of the product and the label location to help you confirm whether your unit is the right one.

Vehicle recalls use the Vehicle Identification Number (VIN) — a 17-character alphanumeric code unique to each vehicle — to determine whether a specific car, truck, or SUV is affected. Unlike other product recalls, vehicle recall notices typically do not list specific serial ranges in the notice itself. Instead, NHTSA maintains a lookup tool at nhtsa.gov/recalls where you enter your VIN to get a real-time answer.

Your VIN is printed on the driver's side dashboard, visible through the windshield from outside the vehicle. It is also on the driver's side door jamb sticker, and on your vehicle registration documents and title. The number starts with a country code (1 or 4 for U.S., 2 for Canada, W for Germany, J for Japan, and so on), followed by a manufacturer identifier and vehicle descriptor codes, and ends with a sequential production number unique to your vehicle.

Entering your full 17-character VIN at nhtsa.gov/recalls will show you all open safety recalls on that specific vehicle — not just the one that triggered you to check. It is worth running the lookup periodically, especially before buying a used vehicle.

NHTSA also maintains a campaign number for each recall. When you contact a dealer to schedule a free recall repair, having the NHTSA campaign number ready (it appears on the recall notice and in the lookup results) helps the service department find the right parts and confirm your eligibility.

Prescription and over-the-counter drug recalls use lot numbers that appear on the label of the medication bottle, box, or blister pack — usually near the expiration date. The format varies by manufacturer, but the recall notice will show the exact lot number string to look for. Common formats include alphanumeric codes like "LN45872A" or numeric codes like "234567."

For medications dispensed by a pharmacy, the lot number should appear on the prescription label affixed to the bottle. If it does not, your pharmacist can look up the lot number for your specific dispensed medication by checking their dispensing records — bring your bottle in and ask.

Drug recalls also frequently specify the NDC (National Drug Code), a standardized 10-digit code that identifies the drug, its strength, dosage form, and the specific manufacturer's package size. NDC codes appear on drug packaging in the format XXXXX-XXXX-XX. If the recall notice lists an NDC, matching it against the NDC on your bottle is the most precise way to confirm whether your medication is affected.

Before stopping any recalled prescription medication, call your doctor or pharmacist. For many drugs, abruptly stopping carries its own risks. Your pharmacy will typically arrange a replacement supply at no additional cost and can verify your lot number from their dispensing records if you no longer have the original bottle.

If you have confirmed that your product is included in a recall, stop using it immediately. For food, this means removing it from your kitchen and not consuming any remaining portions. Do not attempt to cook or heat food that has been recalled for bacterial contamination — standard cooking temperatures do not reliably eliminate all pathogens in all circumstances, and the recall notice exists for a reason.

Take a photo of the identifying codes on the package before you dispose of it — lot number, UPC, best-by date. This documentation is useful if you are seeking a refund, if you later develop symptoms that may be related to the recalled product, or if you need to file an adverse event report with the FDA.

Most grocery stores will accept returns of recalled food items without a receipt. Bring the product or, if you have already disposed of it, the photo documentation and the receipt if you have it. If the store is uncooperative, contact the manufacturer directly using the phone number or website listed in the recall notice.

If your product's lot number, UPC, or date code does not match the recall notice, your specific product is not included in this recall. You do not need to discard it, and there is no safety concern related to this particular recall.

That said, it is worth keeping an eye on the product category. Recalls can be expanded after initial issuance if additional affected units are identified. Subscribing to recall alerts — through the FDA, CPSC, or a service like Recall Radar — means you will be notified if the scope of a recall is updated to include your product.

If you are uncertain about how to read your product's codes, or if the recall notice is unclear, contact the manufacturer directly using the phone number listed in the official recall notice. They maintain hotlines specifically for this purpose during active recalls.