Beneficiary Change Forms Social share icons Please be sure that your beneficiary information is up to date. If you should need to make any changes, please click on the below forms and remit them to our office at 100 Kingston Dr. Pittsburgh, PA 15235. IU Beneficiary Form Three Rivers Beneficiary Form Bricklayers of Western PA Beneficiary Form. To change the beneficiary across all funds, all forms below need to be completed.