Of all the things that go into a credit score, a discrepancy in mailing address often gets overlooked. It’s important that your address be correct, current, and consistent among all 3 of the major credit bureaus. The Guardian features one woman’s story of what happened due to a lag in public records:
I have no skeletons in my financial cupboard so was surprised to see that in April my Experian rating had dropped from “excellent” to “good” – a massive fall of 80 points. It appeared that Experian had never received details of my address at the time. It explained this was down to the way the local authority updated its electoral roll.