Engaging with "Facebook Chat with Opera Mini Verified" schemes exposes you to:

If you are using the desktop version of Opera, there is a built-in Facebook Messenger sidebar that allows you to chat while browsing other sites. Notifications

The concept of a "Facebook chat with Opera Mini verified" typically refers to two distinct things: using the efficient Opera Mini

Another interpretation: On the classic homepage in Opera Mini, near the chat sidebar, you would see a status like:

: Ensure Data Savings mode is enabled in your Opera Mini settings to load text-heavy chat logs faster while using less mobile data.