How to track warranties and serial numbers
Most warranty claims fail for boring reasons. The receipt is missing, nobody remembers the purchase date, or the serial number has worn off. A little record-keeping avoids all three. This guide shows where to find serial numbers, how to work out when a warranty ends, and how to keep it all in one place.
General information only. Warranty terms and consumer rights vary by product, seller and country. Always check the terms that came with your purchase.
1. Why it is worth doing
- Warranty claims. You usually need proof of purchase and the date.
- Theft and insurance. A serial number helps identify recovered items and supports a claim.
- Recalls. Makers publish recalls by model and serial range, so you can check whether yours is affected.
- Resale. A buyer trusts an item more when you can show its history.
2. Where to find a serial number
Locations vary by product, but these are the usual places.
| Product | Where to look |
|---|---|
| Phones, tablets and laptops | In the settings menu under About or System information. Also on the back or underside, or on the box. |
| TVs and monitors | A label on the back panel. Some also show it in a Support or About menu. |
| Large appliances | A sticker inside the door frame, on the back, or inside a drawer. The manual often shows where. |
| Cameras and lenses | Engraved or printed on the body base, or around the lens barrel. |
| Power tools | On the housing or nameplate, often near the battery mount. |
| Bicycles | Often stamped on the frame underneath, near the pedals. |
| Watches | Usually on the case back, or between the lugs. |
Take a clear photo of the label while you are there, because printed labels wear and fade. Do not post serial numbers publicly.
3. Work out when a warranty ends
Find the length of the warranty in the manual, in the box, or on the maker’s website, then count from the date the terms specify. That is usually the purchase date or the delivery date, and occasionally the registration date. For example, a product bought on March 14, 2026 with a two-year warranty would normally run to March 13, 2028. Confirm the exact wording in the terms.
There can be more than one layer of protection:
- The manufacturer’s warranty, included with the product.
- An extended warranty or protection plan, sold by the retailer or maker. Read what it excludes.
- Card benefits. Some credit cards extend the manufacturer’s warranty on things you buy with them. Terms vary widely.
- Your legal rights. Some countries give you rights on top of any warranty. For example, the European Union has a minimum legal guarantee of two years for consumer goods. Check your local consumer protection rules.
4. What to record
- What the item is, with its brand and model.
- The serial number.
- The purchase date and price.
- Where you bought it.
- The warranty length and the date it ends.
- Where the receipt or proof of purchase is kept.
- Who to contact for a claim.
Put it all in one place, in one format, so you never have to hunt through email and drawers. A spreadsheet works. You can start from our free CSV template, which has columns for every detail above.
5. Keep proof of purchase
- Photograph or scan paper receipts straight away. Many receipts are printed on thermal paper that fades within months.
- Save email receipts into one folder or label.
- Keep order confirmations and any registration confirmation.
6. Register products when it helps
Some warranties only apply, or only extend, if you register the product. Check the terms, and keep the confirmation. Registration can also add you to marketing lists, so read what you are agreeing to.
7. Check things before the warranty ends
In the last three months of a warranty, use everything it covers. Run each appliance through its full cycle, listen for new noises, look for leaks, check battery health, and inspect cases for cracks. Problems found while you are covered are usually far cheaper to fix. A monthly look at what ends soonest keeps you from missing the window.
8. Making a claim
- Gather the proof of purchase and the serial number.
- Read the warranty terms, so you know who to contact and what they need.
- Describe the fault clearly, and take a photo or video of it if you can.
- Contact the seller or maker as the terms direct.
- Keep a record of every message, and note any reference numbers.
9. If you run a business
Give each piece of equipment an asset tag, record where it is kept, and keep one register for everything. Ask your accountant which records they need for tax and depreciation. Serial numbers and purchase dates make audits, repairs and insurance claims much easier.
Common questions
What if I lost the receipt?
Look for an order history in the retailer’s account, a card or bank statement, or an email confirmation. A manufacturer can sometimes look up a serial number to find the date it was made or sold.
How long do warranties last?
It varies by product and country. Many consumer electronics start at one year, and some products come with much longer cover. Check your own paperwork.
Do I have to register a product?
Not always. Some warranties require it and many do not. The terms will say.
Is a serial number private?
Treat it as sensitive. Do not post it publicly, because it can be used to make a false claim.