The California attorney general announced his office notified an unspecified number of businesses with mobile apps they are failing to comply with the California Consumer Privacy Act.

Attorney General Rob Bonta said Friday in a press release his office issued letters to companies with mobile apps in the “retail, travel, and food service industries that allegedly fail to comply with consumer opt-out requests or do not offer any mechanism for consumers who want to stop the sale of their data.” Some apps violated the CCPA’s provision to process consumer requests from authorized agents to delete or opt out on the processing of their data, as required by the law, Bonta said.

The CCPA gives California residents the right to know how a company collects their personal data and how it is used or shared, the right to request a business delete their personal data, and the right to opt out of the sale of their personal information. On Jan. 1, the California Privacy Rights Act (CPRA) took effect, which amended the CCPA to add more consumer privacy rights, including correction of inaccurate personal information and the right to limit the use of personal information.