If I post anonymously in a Facebook group, who can still identify me and what should I check first?

Prepare the question in a private draft before opening the composer. Reduce it to the information needed for a useful answer. Do not publish a sensitive 'test' to discover whether the anonymous option works.

1. Open the intended group under the correct Facebook profile. Check its current privacy label and any recent privacy-change notice; do not infer privacy from a reassuring group name, a small membership or an old screenshot. Decide whether the intended audience is suitable for your question before entering personal details.
2. Make a disclosure decision first: would you still share this if the people administering the group could associate it with you? If not, stop. Choose a trusted recipient and a communication channel whose privacy you understand instead. Messaging an admin is a separate disclosure, not an anonymous substitute.
3. Review your private draft for names, addresses, employer details, exact dates, distinctive events and information about other people. Check every attachment, including its visible background and text. Prefer a general question without a screenshot when that gives readers enough context; removing a displayed name alone may not prevent recognition.
4. In the group’s composer, look for an anonymous or nickname option actually offered to you. Read the accompanying explanation and check the selected identity before submitting. Recheck when adding a comment or reaction rather than assuming an earlier choice carries over. If no suitable option is visible, do not publish under your usual name as a test; consult official Help and ask an admin about availability without sending the sensitive draft.
5. Read the group’s rules and the submission notice, then submit once only if the identity and audience are acceptable. Some groups require review of anonymous posts or edits. Distinguish an explicit pending state from a published contribution; a closed composer does not prove either. If the result is unclear, look for the original before trying again.
6. Reopen the contribution or its available pending entry and check the text and displayed authorship. For a problem, privately keep the group link, contribution link if available, date, app version and a minimal screenshot of the status. Your own view is useful evidence, not proof of what every other person sees. Do not expose the draft to strangers just to test visibility.
7. If you shared more than intended, stop adding details. Use an available edit or delete control for that exact contribution and check the result after reopening it. If unavailable or unclear, use official Help and ask the group’s admin for help with the specific link and minimal context. Record whether removal was actually confirmed; do not assume copies, screenshots or earlier views have been undone.