Why do buildings charge so much for a lost FOB?

The charge is not just the plastic. Each FOB has to be enrolled in the access system by someone with admin credentials, the lost one has to be deactivated, and the fee is deliberately set high enough to make residents careful. The administrative time is usually the bigger real cost for the building.

Do passcodes for the buzzer replace unit keys?

No. A buzzer passcode opens the building's front entrance; the unit door keeps its own key or lock. The savings come from the front-door layer, where FOBs and shared entry codes churn constantly, not from unit hardware.

What should a building do when a master or shared entry code leaks?

Rotate it immediately and tell residents, which is exactly the painful drill that makes shared codes expensive. Systems with per-person or per-purpose codes avoid the all-hands rotation, because you revoke the one code that leaked and everyone else is untouched.

Blog / What Lost FOBs and Key Replacements Really Cost a Building

What Lost FOBs and Key Replacements Really Cost a Building

By Ty · 2026-07-06

Every manager knows the ritual. A tenant loses a FOB, the vendor bills the building to deactivate and enroll a new one, and the front office eats the admin time. A departing tenant does not return keys, and now you are deciding whether to swallow the risk or pay a locksmith to rekey the entrance and cut new copies for every unit. Multiply by turnover across a portfolio and physical credentials become a steady, unbudgeted tax.

The deeper cost is security, not money. A copied key or an unreturned FOB is a door that opens for someone who should not have it, and with a shared buzzer entry code the only remedy is rotating the code for the entire building.

How to fix it

Option	Pros	Cons
Keep issuing metal keys	Cheap per copy, familiar	Uncontrolled copies, rekeying the entrance after every loss
FOB or card system	Individually revocable, entry records	Per-FOB fees, vendor admin for every enrollment, hardware to maintain
One shared front-door code	Free, easy to hand out	Leaks in weeks, rotating it disrupts every resident
Buzzer passcodes managed in software	Created and revoked in seconds, per-person, logged, nothing physical to lose	Quick one-time setup with your building

The pattern to notice: physical credentials cost the most exactly when people are careless with them, which is always. Revocable digital credentials at the front door move that churn from locksmith invoices to a settings screen.

Where Lowkey helps

Lowkey replaces the shared-code-and-FOB churn at the building entrance with unlimited 4-digit passcodes you create, change, or revoke anytime, per resident, per vendor, or per purpose. A leaked code is a ten-second revoke instead of a building-wide rotation, recurring windows cover cleaners and maintenance without permanent credentials, and the activity history shows who entered which building and when. It works with the telephone-entry buzzer each building already has, no hardware, and managers run every building’s codes from one account with their whole team.