Miscellaneous topics that do not fit into specific categories.
Your problem is that the mailed PIN is not being accepted by the form at all, not that the code itself is wrong.
- Check the PIN is still valid. Mailed PINs expire, and a replacement PIN cancels the earlier one. If this is the second code mailed to you, only the newest code works — the first one is dead even if it arrived late.
- Enter the code in the current portal, bing.com/forbusiness, not the old bingplaces.com pages. Make sure you are signed in to the same Microsoft account that claimed the listing, and that you are entering the code for that exact listing.
- Try once more in a private window (Edge InPrivate or Chrome Incognito) with extensions off, and paste the code rather than typing it, so a mistyped character is ruled out.
- If Submit still does nothing, do not keep clicking it. Request a fresh PIN from the same page, wait for it to arrive, and try the new code once.
- If the fresh code also fails, use the Support contact form inside Bing Places (dashboard, scroll to the bottom, Support, then Contact Support) and say the Submit button does not respond. The chat queue is not the only route — the form is answered by email.
Common mistakes to check: entering an expired first PIN after a replacement was issued; entering the code while signed in to a different Microsoft account than the one that claimed the listing; and a browser extension or cached page blocking the form submit, which is why the private-window test matters even when several browsers were tried.