Hi, @ChorusAgency. We can transfer sites between team but we usually recommend unlinking the repo from the site before transferring to the current site. We then ask the new site owner to link a repo they do control to the site.
In other words, the repo isn’t controlled by Netlify. We can transfer the site to your control but not the repo as we have no way to do this.
As far as proving you own the site, at Netlify that is done by having the email address and password required to login. If you don’t have that you don’t own the site.
If someone has uploaded copyrighted content that you own you can make a DMCA takedown report and we can suspend the site but we don’t transfer it to your control. We can only do transfer with an email from the current site owner.
I’m showing the two sites are now linked to two different repos now and it appears your site is building successfully. Do you still want us to email the current site owner and ask them for permission to transfer the site?
I also see there is a custom domain assigned to this site. We can remove the custom domain from the existing site if a verification DNS record is created:
Please let us know if you would prefer to do a DNS verification or if we should email the site owner. If there are further questions about this, please let us know.