Problem: Tenants are leaving garage door open

[Nicholas Jose]

Good evening, BP.

Last night, my 1st-floor tenant has complained to me that the basement door leading to the garage is being left slightly open. I figured it's the 2nd-floor tenant leaving this door open, so as to not single him out or directly confront him, I sent out the below text message to the tenant group chat:

"Good evening, everyone. This is just a quick reminder: for everyone's safety, please close all doors - front, back, and garage - when you enter and exit the apartment. The screen doors, however, can be left unlocked. Thank you, and enjoy the rest of your night!"

Today, my 1st-floor tenant sent me a picture of the garage door left slightly open. I brought this issue up to my real estate agent and she said that the 1st-floor tenant is just a whiner. How can this situation be dealt with?