According to this BBC report the Littlewoods saga is getting legs. We have the differences of opinion with various trading standards over the legality of Littlewoods actions in retrosepctively charging people the discount taken in error.
What I do not understand is this. Littlewoods are a database marketing company so will have all sorts of credit and historical tracking records in their operational databases. If they issued only 70k+ codes to specific current customers then they know who is illegiable to use them. When someone other than one of the original 70k+ people respond then it is a simple database field look-up to see that they are not elligiable as they do not match the name on the Littlewoods database.
I bet you Littlewoods can identify people who are over their credit limit and put order processing and delivery on hold. Why not the ones who were not entitled to the discount?