Here's a sample to help you write a complaint letter about a product or service. Request assistance from a Benefits Advisor.To get a Benefits Advisor to call you, submit your name, address and phone number. In this article, we break down some of ERISA's complexities and highlight its key rules of engagement. In this post, we discuss the ERISA claim process, appealing your ERISA claim, filing an ERISA complaint, when to hire an attorney, and more. Step 1: Review the Denial Letter. ERISA claim denials are notoriously challenging to contest. Documents in a producible format. (c) Administrator's refusal to supply requested information; penalty for failure to provide annual report in complete form. (1). PBGC moved to dismiss the complaint based on improper service of process and improper venue.