Key Lockbox System

How the Lockbox Allocation was Calculated

How Your “No Lease Fee” Lockbox Allocation is Calculated 

Your 2018 “no lease fee” iBox allotment was determined by your listing activity in Heartland MLS each month in 2017. Here’s how the calculation was made:

Once each month, usually around the middle of the month, a “snapshot” of your listings in Heartland MLS was recorded for use in creating the lockbox allocation calculation. All residential listings with the following statuses: active, show-for-backup, contingent, pending, temporarily off market and auction status, were recorded and retained for use in the calculation. Non-residential listings (multi-familiy, land, and commercial) with the same status as listed above in MLS and with “iBox” indicated in the “Showing Instructions” field were also included in the calculation to determine your 2018 allocation. The total count of these listings were used to create the average.

An example of an allocation calculation:

and Day

Number of Listings 
That Day

Jan 14
Feb 15
Mar 16
May 12
June 15
July 15
Aug 11
Sep  16
Oct 15
Nov 12
Dec 10

26/12 = Average of 2.16 listings

2.16 is rounded up to 3  

Annual no lease fee allocation: 3 iBoxes.

*May not be the actual date of the listing activity snapshot; for illustration only. Members do not have to pay any lease fees for allotment lockboxes.  Additional iBoxes over/above the no cost allotment are available anytime needed for an annual fee lease at the equivalent to $1.67 per month.  Annual lockbox leases run from March 1 to February 28 and are $20 if leased in March.  Each month after March, the annual lease amount is reduced by $1.67.

CBS Codes

REALTORS® who want Affiliate Members to access their iBoxes need to know the “CBS Code” that is assigned to each iBox.

Affiliate Members such as inspection companies and appraisers may now lease Supra keys. Many have obtained a key to provide better service to REALTORS®. This can be a real time and money saver for REALTORS®, often eliminating the need to meet Affiliate members at properties.

Affiliate keys work just like other keys, except that Affiliates will need to enter a “CBS Code” in addition to their PIN number to open iBoxes. Each iBox is already programmed with a “CBS Code” – please don’t change that setting on your iBoxes.

When Affiliate Members call to make an appointment to enter one of your listings, they’ll ask you for that listing’s lockbox CBS Code and they must have that code to open the box.

For Supra Assistance

If you experience a problem with any of your Supra equipment, call the Supra support line at 1-877-699-6787. The support line is available 7 days a week from 8:00 a.m. – 9:00 p.m. Central time.

Before calling, you may be able to troubleshoot the problem with some basic instructions available on

The User Guide you received with your key is also a good reference for basic information, including how-to instructions for performing a manual eSYNC (page 12 of the DisplayKEY User Guide) or manually updating your DisplayKEY (pages 15-16 of the DisplayKEY User Guide).

Files & Links