Fighting against data quality flaws is often most successfully done at data entry. When incorrect information has been entered into the system it most often seems nearly impossible to eliminate the falsehood.
A hilarious example is told in an article from telegraph.co.uk. A local council sent a letter to a woman’s pet pig (named Blossom Grant) offering the animal the chance to register for a vote in last week’s UK election. This is only the culmination of a lot of letters –including tons of direct marketing – addressed to the pigsty. The pigsty was according to the article wrongly registered as a residence some years ago after a renovation. Since then the owner (named Pauline Grant) of the pig has tried to get the error corrected over and over again – but with no success.