Sorry for your loss man his title/position was called carwash btw. Im not sure if you live close to the building he worked at but you could most likely take his ID to the building and get in and find someone
UPS can pay out his last paycheck and his sick/vacation bank. All other benefits are thru the local union. If he was paying dues at my local when he died he would get 10k to his beneficiary. Also Teamcare has some decent benefits to continue coverage for spouse and children in case of death. And there is some type of payout of his pension assuming he has been at UPS at least 5 years.