A lot of companies verify postcodes with QAS, so probably worth reporting it to them: http://www.qas.co.uk/knowledge-centre/product-information/address-postcod

A lot of companies verify postcodes with QAS, so probably worth reporting it to them: http://www.qas.co.uk/knowledge-centre/product-information/address-postcode-finder.htm http://www.qas.co.uk/knowledge-centre/product-information/ad... They are run by Experian who one of the main credit check companies in the UK, so you might be able to hit two birds with one stone :D