Use Slack or Signal for work? Don’t delete your chat history. The Federal Trade Commission and Department of Justice said Friday that companies under investigation will have to turn over these messages or face potential civil penalties and criminal obstruction charges.

“These updates to our legal process will ensure that neither opposing counsel nor their clients can feign ignorance when their clients or companies choose to conduct business through ephemeral messages,” Manish Kumar, deputy assistant attorney general at the DOJ’s antitrust division, said in a statement.