In this post, we discuss the ERISA claim process, appealing your ERISA claim, filing an ERISA complaint, when to hire an attorney, and more. Hi, I'm Attorney Nathan Bax here at the Foster Law Firm and today I wanted to give you some tips about how to file your ERISA claim.Call our office at 6028050577 for your free initial consultation today. If you'd like to file a complaint against a fiduciary, please fill out the complaint form and mail, fax or hand deliver to the address below. ERISA claims are often very complex and difficult. If you are in need of an experienced Arizona attorney, contact Callagy Law. We are an experienced law firm in Phoenix AZ who want to help you. STEP 1: USING BLACK INK ONLY, Fill out the "Civil Cover Sheet. " â–« Write in "Maricopa" as the county. It concluded that the complaint failed the twopart Davila test of complete ERISA preemption.