Hello,
Thank you for contacting Rank Math today.
You can easily delete this website activation from your account by heading over to your Rank Math account on this page https://rankmath.com/my-account/websites/
This will not cause any data loss, your client will then need to sign up for an account and then activate it via Rank Math > Dashboard > Help tab.
Looking forward to helping you. Thank you.
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.