LaserShip review: Driver

Good afternoon, I am a Security Director at a residential property located at 575 Exterior Street Bronx, NY. I attempting to locate a delivery driver that is employed by your company. He drives a white van, License plate 68020NA. The reason we know he works for your company is because we had the police department run the plate. The driver comes into the building on a daily basis to harass the security at the desk. He states we do not open the door during deliveries. The building houses domestic violence victims and we have to be very careful who we let in. He does not have a uniform or ID and the van is a plain white van with no markings making it difficult to identify him as a delivery person. When he does come in, he is irate and extremely aggressive. He refuses to sign in which is a building rule for all people. He curses and berates security the entire time he is in the lobby. We do not know if this person is mentally ill and/or capable of violence. We are also contacting the property attorneys for guidance and creating a police report. Your help will be greatly appreciated. Thank you!