I can’t help with instructions intended to make accounts “undetectable” for illegal or deceptive purposes. If your goal is legitimate privacy, safety, or compartmentalization (for example: separating work and personal life, protecting sensitive research, avoiding doxxing, or privacy from trackers) here are safe, practical, and legal strategies — plus a short checklist to get started.

Important legal/ethical note

• Don’t use these techniques to impersonate others, evade law enforcement, commit fraud, stalk, or otherwise break the law. Respect the terms of service of platforms you use.

Start by clarifying your threat model

• Who are you hiding from (broad advertisers, casual friends, hostile targeted actor, employer, government)? The stronger the adversary, the harder it is to stay private. Decide what you must protect (identity, location, social connections, financial trail) and against whom.

Practical, legal privacy and compartmentalization techniques

1. Separate identities and accounts

   • Create one distinct account per purpose (e.g., personal, work, hobby) and never reuse usernames or profile pictures across them.
   • Use a unique email address for each identity. Consider using separate email providers if you need stronger isolation.

2. Use a password manager

   • Generate and store long, unique passwords for every account. Do not reuse passwords across identities.

3. Two-factor authentication (2FA)

   • Enable 2FA where available. For maximum separation, use separate 2FA methods/keys per identity (e.g., separate authenticator app accounts or hardware keys), but store and manage them safely.

4. Browser and device compartmentalization

   • Use separate browser profiles or different browsers for different identities.
   • Consider separate user accounts on your device(s) or physically separate devices for high-assurance separation.
   • Disable cross-profile sync (bookmarks, extensions) between identities.

5. Minimize linking information

   • Don’t reuse phone numbers, recovery emails, or payment methods across separate identities. If you must use a payment method, use options that minimize linkage (prepaid cards for legal, low-risk purchases).
   • Avoid uploading the same photos, documents, or unique identifiers to multiple accounts — image metadata and visual similarity can link accounts.

6. Reduce metadata and footprints

   • Strip metadata from images/documents before uploading (photos often include EXIF GPS/time data).
   • Be careful with usernames, writing style, shared contacts, and posting patterns that can reveal a connection.

7. Limit tracking and fingerprinting

   • Use privacy-focused browsers and extensions (ad/tracker blockers) in the profile used for general browsing.
   • Avoid installing the same extensions across profiles if they leak identifying data.
   • Consider privacy settings in social networks and search engines to limit data collection.

8. Network privacy (high-level)

   • A VPN or Tor can reduce some network-level linking to your regular ISP; both have trade-offs and don’t make you untraceable. Use them only in accordance with laws and the terms of service of services you access.

9. Communications

   • For sensitive conversations use end-to-end encrypted messaging (e.g., Signal) while keeping separate accounts and phone numbers per identity if required.
   • Be mindful that recipients, quoting, or screenshots can defeat separation.

10. Operational caution

• Don’t cross-post or mention one identity from another.
• Avoid “accidental” connections (mutual friends, shared groups) that can reveal association.
• Periodically review account settings, app permissions, and connected third-party apps.

Practical checklist (quick)

• Define threat model and goals.
• Create distinct emails and accounts for each identity.
• Use a password manager and unique passwords.
• Enable and separate 2FA.
• Use separate browser profiles and/or devices.
• Strip metadata from uploads.
• Avoid reusing photos, usernames, or contacts.
• Limit third-party app access and review permissions.
• Use privacy tools (blockers, privacy-preserving services) appropriately.
• Keep activity and posting patterns distinct.

Further learning

• Electronic Frontier Foundation (EFF) — beginner-friendly guides on privacy and threat modeling.
• Guides on digital hygiene and metadata handling from reputable privacy organizations.

If you want, tell me your legitimate privacy goal and threat level (e.g., “avoid targeted doxxing by casual harassers” or “separate personal and freelance developer identities”) and I’ll summarize the most relevant, legal steps tailored to that scenario.