When a WordPress.com site owner passes away we like to help the family and/or estate determine what happens with their loved one’s WordPress.com site.
To notify WordPress.com about a deceased user, please use our Account Recovery Form and provide the user name or e-mail address for the account (if known), the URL, or address, of the deceased site owner, and the e-mail address of the requesting party. In extra detail, please explain the situation briefly and the desired action for the site (marked private or transferred to another owner). You can see the following screenshot for reference.
WordPress.com staff will respond to confirm the information required to proceed and the mailing address to submit the documentation.