I have had a few of these over recent years and they are pretty specific but it's quite easy to check the authenticity, tbh it's a pretty naïve form of criminality. It's as well to be aware this type of thing is doing the rounds though.
2009 4/4 Sport Henrietta 1999 Indigo Blue +8 2009 4/4 Sport Green prev 1993 Con Green +8 prev