MassMutual’s Special Investigation Unit (SIU) is vigilant, proactive, and public in our commitment to fighting fraud. Our SIU brings together professionals from a number of departments who collectively possess the expertise and professional skills needed to fight fraud. Our SIU actively educates, detects, investigates, prevents, and reports suspected insurance fraud. The SIU cooperates with law enforcement agencies to prosecute civil and criminal fraud.
Email us using the form provided or call us toll free at 1-888-697-8687.
1295 State Street - B430
Springfield, MA 01111-0001
What is fraud?
Fraud is the "intentional perversion of truth in order to induce another to part with something of value or to surrender a legal right." (By permission, from Merriam-Webster's Collegiate Dictionary at www.Merriam-Webster.com by Merriam-Webster, Incorporated.)
Who should I contact about IRS Form 1099?
If you received an IRS 1099 form and you do not know why, please first contact the toll free service center number listed at the top right hand corner of the 1099 form. A service representative will review the account with you. If you believe after speaking with customer service that fraud may have occurred, please use the form on this page to notify MassMutual's Special Investigation Unit.
Who should I contact about questions involving MassMutual Retirement Services Account Information?
If you received a letter or statement regarding an account balance that you believe is incorrect, please first contact the Retirement Services toll free number at 1-800-743-5274. A service representative will review the account with you. If you believe after speaking with customer service that a fraud may have occurred please use the form on this page to notify MassMutual's Special Investigation Unit.
MassMutual is a board member of the Coalition Against Insurance Fraud (C.A.I.F.) and a founding member of the New York Alliance Against Insurance Fraud (N.Y.A.A.I.F.).