Letterback
Private pilot · 2026
No names. No addresses. No accounts.

Doorstep-verified address signals

Better address data starts at the door.

Letterback gives the person holding misdirected post a ten-second way to say, “they don't live here anymore”.

Try the pilot scannerSee an unrecognised code

Uses fictional pilot records. Nothing you enter is requested or stored.

Letterback
PILOT / 001

Getting post for someone who moved away?

Scan to help stop it. One question. About ten seconds.

PHYSICAL
PROOF

From envelope to evidence

One small action.
Three useful outcomes.

Less wasted post, lower data-protection exposure and a better way to learn when address records have gone stale.

01
A code goes on the envelope
Every mailpiece receives its own unguessable Letterback code. No name or address enters our system.
02
The current occupant answers
One neutral question, two equally weighted choices, no account and no personal details.
03
Evidence becomes a signal
Repeated reports are corroborated before a sender is told that a record may be out of date.

Privacy is the architecture

We cannot leak a sender's customer data because we never receive it.
Letterback stores opaque references, random codes, timestamps and button presses. The sender keeps the identity.
Built for the UK direct-mail pilot.