Reddit users in the United Kingdom will now be blocked from accessing “certain mature content” unless they complete the platform’s new age verification process. Reddit announced on Monday that UK users will need to upload a selfie or a photo of their government ID in order to view content that’s restricted for under-18s by the UK Online Safety Act (OSA), including abusive, violent, and sexually explicit materials. The age verification process is performed by Persona, a third-party provider that won’t have access to users’ Reddit data or retain photos for longer than seven days. “Reddit was built on the principle that you shouldn’t need to share personal information to participate in meaningful discussions,” Reddit said in its announcement. More information about the verification process can be found here.