If you read the message, it's very noncommital. You "may have been impacted" which doesn't take a position either way. They could issue that response regardles

If you read the message, it's very noncommital. You "may have been impacted" which doesn't take a position either way. They could issue that response regardless of what you type and cover all possibiliites. My guess: to account for typos, they are responding with "may have been impacted" if they get a hit on either the name or SSN, not only when there is a match on both.