A while ago I wanted to delete whole Google account(because it's recovery mail was a custom domain, and this domain is not used anymore so I don't want new owner of domain to recover this Google account). And I deleted account, but today my friend said that "you may be deleted only Gmail service and someone can login with alternate mail, so be sure that you completely deleted Google account not just Gmail".
When I try to login with ....@gmail.com and it says "This account was deleted". So how can I be sure that whole account has deleted or I just deleted Gmail account.
Edit: It's not a work/company account, it's an ordinary Google account.