You cannot do this lawfully, and we will not walk you through it. Taking over somebody's Facebook account - by phishing, a password reset trick, a session cookie or a "recovery service" - is unauthorised access to a computer system. That is a federal crime in the US under the CFAA, an offence under the UK Computer Misuse Act, and equivalent in the EU, Canada and Australia. The "hackers for hire" advertising this on Instagram and Telegram are almost always running an advance-fee scam: they take a deposit, send a fake screenshot, then ask for more.
If the account is yours and you are locked out
Use facebook.com/login/identify - it walks you through email, phone, trusted contacts and ID verification. If 2FA is the blocker, use a recovery code or the "try another way" flow. If the account was hacked, report it at facebook.com/hacked; Meta will lock it and help you recover it, and you can review logged-in devices afterwards.
If your worry is your child's account
Meta's own supervision tools do more than most parents expect, and they are free:
- Family Center lets a parent pair with a teen's Instagram or Facebook account: see time spent, set daily limits, see who they follow and who follows them, and get notified when they report someone.
- Login alerts and trusted contacts tell you when a new device signs in.
- Privacy checkup locks the profile to friends only, which removes most of the risk that made you worry in the first place.
What Family Center deliberately does not do is show message contents. That is where device-level monitoring comes in, with consent: mSpy and Eyezy read Facebook Messenger on a device you control, alongside the other apps. Affiliate links, same price for you.
If someone hacked your child
Do not counter-hack. Screenshot everything, report the account to Meta, change the passwords from a clean device, and if there are threats or intimate images involved, report to the police and to the platform's safety centre - that route actually gets accounts removed.
One dashboard for the devices you actually own: Ultimate Phone Spy covers Android phones, Windows PCs and Macs — SMS, call logs, location history, geofences, web history and installed apps in a single account (plans and pricing, system requirements). It is installed openly on devices you administer, and it does not cover iPhone because iOS does not permit that level of access.