CBU Mailbox Keys: Where to Find Them After Delivery

This is a customer's most common question after receiving their CBUs. If you received your CBU only to discover that no separate packages containing keys were included with your shipment, don't worry!

Answer: The keys are inside the CBU. The keys are typically sealed in a plastic bag and taped to the back of the locker. If your unit includes multiple parcel lockers, check each one. They may also be inside a smaller tenant box, so if you don’t find them in a parcel locker, inspect the entire unit.

Video Transcription

When you receive your cluster mailbox, whether it's a 4C or 4C Pedestal, the keys will be locked inside. Here's how you access the keys:

Step 1: Open the Master Door

You'll do this by first reaching inside the outgoing tenant box labeled "US Mail." Open this tenant door using the small, round opening designed for the USPS Arrow Lock.

To retrieve your keys, pull up on the hinge located inside the outgoing tenant box you just opened. This will release the master door, allowing you to access all tenant boxes. On double column units like the one shown in the video above, you will open the right column door first, followed by the left column door.

Step 2: Retrieve your keys from the Parcel Locker

Now that you have opened the master door, you will find the keys sealed in a plastic bag taped to the back of the parcel locker. If the unit you purchased has more than one parcel locker, please check all of them. The keys could also be in one of the smaller tenant boxes, so check the entire unit if your keys are not in one of the parcel lockers.

Below, we've included a diagram of the pedestal cluster mailbox:

Easy release handle to open master gate

Heavy-duty tenant cam lock with three keys

Rugged, weather-resistant powder coat finish in four architectural colors

Stainless steel hold-open door catch on each side of master gate

Aluminum comb prevents mail fishing in outgoing mail collection compartment

Heavy-duty cam latches through frame for added security

Matching Aluminum Pedestal (included)

Retrieving Keys from Private Use Units

The Master Lock should arrive already installed on your unit. The key to your master lock should be in an envelope taped to the side of your unit.

If you have any questions or cannot locate your CBU keys, please call us at (866) 707-0008.

This blog article was first published on 02/22/2016 at 6:18 AM and updated on 03/03/2025 at 9:05 AM.