Call came in to my cell number on 4/17/17, at 11:18 a.m. Caller indicated he was from Visa/Master Card Services, and since I had recently made a payment, presumed from my bank. Mentioned they had been monitoring my account for the past several months and I had been on time with my payment, was that correct? And I said "YES, but…. I was in touch with my bank." And before I could say anything more the caller hung up.I immediately realized what I had done… said "yes."No activity as yet; I will monitor.