I received a phone call from from the Fraud Service Center on behalf of Impressia Bank about a possible unauthorized transaction on my Visa Check Card. Is that call legitimate?

Yes.  All Impresia Bank Visa Check Cards feature fraud monitoring to help protect you from fraudulent purchases.  The Fraud Service Center will contact you via phone if a purchase appears to be fraudulent.  If you have received a phone call or voicemail from the Fraud Service Center, they can be reached at 1-866-842-5208.