Why metal backups fail the kitchen drawer test

Last month, a client brought a stainless steel backup plate to our Busan office. The engraving was precise. The plate had survived a minor kitchen flood two years earlier. It failed our review for a simpler reason: it was stored in the same drawer as the hardware wallet it protected.

The material question

Holders often ask whether steel or titanium is the better backup medium. In practice, the material rarely determines whether a backup survives. Legibility after engraving, resistance to household chemicals, and whether the plate can be read without magnification matter more.

We have seen paper backups outlast metal plates that were stored in humid basements and developed surface corrosion that obscured three words.

Placement over material

The kitchen drawer test is informal: if someone searching your home for valuables would find your seed phrase and your wallet in the same search, your geographic distribution has failed regardless of what the plate is made from.

Recommended practice separates device and backup by location, not just by container. A metal plate at a relative’s home and a device in your study passes. Two items in the same drawer does not.

Engraving verification

Many holders engrave a plate once and never verify the words against their paper copy. We recommend a comparison exercise within 24 hours of engraving — before the plate is placed in its long-term location. Transposed letters are more common than holders expect.

When to revisit

If you engraved a plate more than three years ago and have not looked at it since, schedule a visual inspection. Corrosion, household moves, and lending the plate to a family member for “safekeeping” all introduce risk.

A Treasury Custody Review session includes a structured walkthrough of your backup materials and storage locations.