In a few stores here in Australia, I am asked for my post code (or country of residence if no post code) by the cashier when ringing up a sale. Predominantly at tourist/tour related points of sale, but I've also had it an electronics and white goods stores.
No idea if the operator is also recording gender and perceived age group etc., but I do know that on most occasions, you can opt not to answer the post code question.
No idea if the operator is also recording gender and perceived age group etc., but I do know that on most occasions, you can opt not to answer the post code question.