Facebook does not allow fully anonymous posts in most places
Use a Facebook Group that allows anonymous posting
Open the group and check whether anonymous posting is enabled
Tap or click Create post
Select Anonymous Post if the option is available
Write your post and submit it
If anonymous posting is not available, ask a group admin to enable it
Use a throwaway account only if it complies with Facebook rules
Avoid sharing personal details in the post
Review the group’s rules before posting