Read the address from right to left

For normal domains, the registered owner is near the end. In `login.chatgpt.com.example.invalid`, the official-looking words are only a subdomain of `example.invalid`. That is not the same as `chatgpt.com`.

Separate product, help and status

The product belongs at `chatgpt.com`. Help articles and status pages may live on OpenAI-controlled domains. A random page that mixes login, billing, status and urgent support in one place deserves extra suspicion.

Be skeptical of generosity

"Free Plus forever", "unlimited Pro", "bypass ChatGPT limits" and "recover your suspended account now" are not normal login messages. They are emotional hooks: greed, urgency or fear.

Do not paste sensitive links everywhere

If a URL contains private tokens, invite codes or account recovery data, do not paste it into random tools. This checker is local-only, but the broader habit matters.