I have deleted a Netlify account. in that one of my custome domain is there

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You can verify ownership of the domain and we can assist in removing that domain from the old account following these instructions:

[Support Guide] "another site is using this domain" Verifying domain ownership for Netlify production domain

Last Reviewed by Netlify Support Staff: May 2024 Are you receiving the error “another site is using this domain” when you are trying to add your production domain to your Netlify site? Read on! This is easy to fix. This occurs when you are trying to add a production domain that already exists on Netlify under a different account. Do you know who might be using the domain (maybe a previous collaborator or an agency you’ve worked with in the past?), the quickest way to get this resolved is for…

Let us know when that’s done and the name of the domain and we can proceed from there.