I’m very sorry for your loss, and taking care of this is a thoughtful and important step.
The Process in Brief: You will need to submit a ‘Memorialization Request’ through Facebook’s Help Centre, which will require you to provide a link to your uncle’s profile and proof of his passing.
This process is designed to respectfully preserve their profile, which serves as an archive of all the text, image, and video content they shared with friends and family.
Once the request is approved, the word ‘Remembering’ will appear next to his name, the account will be secured, and it will no longer appear in public spaces like birthday reminders. You can find the official request form by searching for ‘Memorialization Request’ in the Facebook Help Centre. The form will ask for his profile URL and require you to upload verification, such as a link to an obituary or a scan of the death certificate. If your uncle had designated a ‘Legacy Contact’, that person can manage tribute posts; if not, the account will simply remain as a place for friends and family to visit.
Cheers,
Jeff