Member Central


SentriLock is GKAR's official lockbox provider, however GKAR Members are able to check out Supra Keys to access lockboxes outside of the GKAR service area.


SentriLock Support

SentriKey App

SentriCard® Agreements

Helpful Links

Assigning a Lockbox to a Listing (PDF) SentriCard® Reader Software Download Changing Your SentriCard® Pin (PDF)
Generating 1-Day Codes (PDF) Lockbox Battery Replacement (PDF) Lubricating Your Lockbox (PDF)
Lockbox Policies and Procedures (PDF) Lockbox Troubleshooting Guide (PDF) Lost SentriCard®
Mobile Site Getting Started (Video) SentriKey App Getting Started Guide (PDF) Upgrading Your Lockbox (PDF)
SentriConnect® Help Sheet (PDF)    


Frequently Asked Questions

1. How do I get lockboxes and what is the cost?
2. What if I lose or damage my SentriCard®?
3. Can I use a mechanical lockbox on my listings?
4. When will I get my SentriCard®?
5. How much does a SentriCard® cost?®
6. Is there a SentriLock app I can use?
7. How often do I need to renew my SentriCard® to keep it working?
8. Do I need to buy a SentriCard® reader?
9. What do I do if I have problems with a lockbox?
10. If I'm not a Member of GKAR, can I rent a SentriCard® to access properties? 
11. Does GKAR have Supra keys available for agents to show properties outside of the GKAR service area?
12. What is SentriConnect®?

1. How do I get Lockboxes and what is the cost?

Lockboxes are available from your broker. Ask your broker what their office policy and procedure is for obtaining lockboxes. GKAR does not charge a per lockbox fee, the lockboxes are included in your REALTOR® dues and fees.


2. What if I lose or damage my SentriCard®?

In the event of a lost SentriCard®, the key-holder will be required to pay $13.00 for a new SentriCard®. Replacement cards will be offered at no charge for a damaged SentriCard® that can still be offered to GKAR staff as proof of possession. Amounts are subject to adjustment at the discretion of the GKAR Board of Directors when necessary. Cards that need to be replaced due to product defect can be exchanged at no charge.


3. Can I use a mechanical lockbox on my listings?

Check with your broker to see what your office policy is. GKAR does not require a SentriLock lockbox to be placed on every listed property, however using a mechanical lockbox versus a secure electronic lockbox does increase your liability.


4. When will I get my SentriCard®?

Once you complete the lockbox portion of New Member Orientation and submit a signed SentriCard® Agreement, GKAR staff can create a SentriCard® for you.


5. How much does a SentriCard® cost?

Your first SentriCard® is provided at no cost. If you break your SentriCard® or it becomes worn out from extensive use, bring it into GKAR for a free replacement. If you lose your SentriCard®, there is a $13 fee charged for the replacement card.


6. Is there a SentriLock app I can use?

SentriKey is an app available as a free Member Benefit. Once you have a SentriCard® issued in your name you may download and use the SentriKey App to generate an access code to show properties you have received permission from the listing agent to show. Always following the Showing Instructions found on every listing in flexmls.


7. How often do I need to renew my SentriCard® to keep it working?

A SentriCard® expires every day. During the renewal process the reader is taking all of the showing information from the chip of the card and updating the SentriLock website, and the listing agent, which lockboxes you’ve accessed for showings. The reader is also checking to make sure you are still a GKAR Member in good standing so the SentriCard® can continue working.


8. Do I need to buy a SentriCard® reader?

Each Broker was supplied with a SentriCard® reader for their office and some offices have purchased additional readers that are located at workstations throughout their office. GKAR also has several readers that can be used to renew a SentriCard® at a member’s request. If you do not predominantly use the SentriKey App and it is not convenient to renew your card at your Broker’s office or GKAR, SentriCard® readers can be purchased at GKAR.


9. What do I do if I have problems with a lockbox?

Anytime an error light is illuminated on a lockbox or it is non-responsive, contact SentriLock Support at the number located on the back of your SentriCard® or use the SentriKey  Smart App to tap the Support icon at the bottom right corner of the screen.


10. If I'm not a Member of GKAR, can I rent a SentriCard® to access properties?

Non-GKAR Members (who are Members of MichRIC®) may lease GKAR SentriCards® for a fee. To inquire about this service, please contact Samantha Bartlett.


11. Does GKAR have Supra Keys available for agents to show properties outside of the GKAR service area?

SentriLock is the official lockbox vendor of GKAR, however a small supply of Supra keys are available for those agents who wish to show properties outside of the GKAR service area. 


12. What is SentriConnect®?

SentriConnect® is a mobile app that allows the user to temporarily access a listing agent's lockbox. The user must be granted SentriConnect® access by the listing agent. SentriConnect® accesses to a lockbox are displayed in the listing agent's access log. This allows secure tracking of lockbox activity. The app now takes the place of the Contractor Codes, which are no longer available.


Make the Most of your Membership!

When you get involved, you open up a world of opportunities to build your network, your resume, and your business. Take advantage of the exciting benefits and opportunities available to you at GKAR.

GKAR Member Tech Helpline
Phone: (866) 619-8099

Live Chat:
Hours: Monday - Friday, 9:00 am - 8:00 pm
Saturday, 9:00 am - 5:00 pm

MLS Support

Phone: (269) 382-1985
Hours: Monday - Friday, 8:00 am - 5:00 pm

MLS Emergency Hotline

Phone: (269) 382-1597
Hours: Monday - Friday, 5:00 pm - 8:00 pm
Saturday - Sunday, 9:00 am - 5:00 pm

Supra Keys

Supra keys are available at GKAR as Member benefit.

Request Supra Key

Supra Key basics:

  • Reserved no more than 24 hours in advance of pick-up by calling (269) 382-1985 or by emailing a request
  • Checked out by any GKAR REALTOR®  Member in good standing
  • Checked out by any GKAR Business Partner in good standing who are: home inspectors, licensed pest control companies, environmental companies, and well/septic inspectors
  • Checked out for no more than two (2) business days
  • Used in accordance with the Showing Instructions in the MLS or with permission to access property from the owner or listing broker/agent


$250 Replacement Fee - Lost, stolen, or returned damaged or unusable Supra keys; charged to agent who borrowed the key

$10/day Late Fee - Supra keys not returned within the 2 business days permitted

*See Supra Key Borrowing Policy for full details.