Quick answer: a strong mattress warranty claim documents four things before you contact the company: proof of purchase, the mattress law tag, the defect itself, and the support system under the mattress. For sagging claims, measure the unloaded indentation rather than how far the mattress sinks while you are lying on it.
Mattress warranty claim checklist
- Find your receipt or order confirmation.
- Find the law tag and photograph it clearly.
- Photograph the entire mattress from several angles.
- Photograph the defect close up.
- Photograph the foundation, frame, center support and slat spacing.
- Measure any visible indentation with no weight on the bed.
- Read the warranty for your exact model and purchase date.
- Submit the claim through the manufacturer or retailer specified in the warranty.
Why foundation photos matter
Improper support is one of the most common warranty exclusions. Many brands specify maximum slat spacing and center support for queen, king and California king mattresses. Do not replace the foundation before photographing the setup you actually used.
How to photograph mattress sagging
Remove bedding and let the mattress sit unloaded. Place a straight edge across the indentation and measure vertically from the bottom of the straight edge to the deepest point of the impression. Photograph both the straight edge and measuring tool in the same frame.
Do not confuse comfort with a defect
A mattress becoming softer is not automatically a warranty defect. If you are still within the sleep trial and simply dislike the feel, use the return process instead. See our mattress return policy comparison.
Brand warranty guides
Start with our mattress warranty guide, which links to current brand-specific coverage and sag thresholds.
Bottom line
Document first, then file. A claim with clear measurements, law-tag photos, proof of purchase and foundation photos is easier for a warranty department to evaluate than a general complaint that the mattress “feels saggy.”