Lawyers in the $9.2 billion Deepwater Horizon settlement are accusing BP PLC of accessing confidential information about individuals and businesses that have filed claims for oil spill damages.

The dispute is the latest centered on the class action settlement for economic damages associated with the 2010 spill. BP, in court filings and in the press, has asserted that the settlement has been misinterpreted so that businesses with no spill damages have been paid under the claims process.