A pile of Buller District Council financial records, including ratepayers' private information, has been dumped at a local tip.
A Westport woman found the papers when she went to the Karamea tip to collect bottles on Thursday.
She said there appeared to be a truckload of information. "There was miles and miles - a huge amount."
The records included details of cash payments by named ratepayers and confidential PAYE details for council staff, said the woman, who asked not to be named.
"It was the first thing you came to - this spread as you got right up to where the rubbish is," she said.