Product
Five characters, one door.
A code points to one building or khashaa, with the state's registered address behind it. Codes go only to doors checked on site.
Easy to say
Digits and consonants. No vowels, no I, L, O or U. Cyrillic lookalikes such as К, М, Т and Х are mapped. Add a flat number after it: "K7M4X 17".
Checked on site
A driver at the door taps "here" and takes a photo. The photo reaches the door after a person reviews it.
A code is never reused
A retired door's code answers "retired" and never moves to another door. A code is not an address: the card shows the address first, the code after it.