SCAM - There is no office of investigations. They will be demanding money from you (possibly claiming to be the IRS or for an unpaid loan that you never had). Phone calls are not official notification of anything - regardless of what that caller says.
SCAM - There is no office of investigations. They will be demanding money from you (possibly claiming to be the IRS or for an unpaid loan that you never had). Phone calls are not official notification of anything - regardless of what that caller says.