Found the document. It's not satire.
Here is the Motion to Change Name (images) for Hunter Biden's love baby, and his attorney's response to that motion, both in PDF.
https://drive.google.com/drive/folders/19WpKpFvlpa_VpvDQ8irhlm0eSlZK5Q2J
Here is the court website:
https://caseinfo.arcourts.gov/cconnect/PROD/public/ck
YourDaddyJoey is a user-generated social media / news reporting / research providing organization for those who are curious and concerned about Far-Left influence in the United States.
www.yourdaddyjoey.news
BREAKING: Who wants to see 2,000+ pages of Dominion internal Emails that have just been leaked?
Yes, I have them.
We are digesting them now, and distributing them to parties, and will release them in full within an hour.
LEGAL: http://www.givesendgo.com/joeycamp
Source: TheResearcher2020 (I do not confirm nor deny being TheResearcher2020).
UPDATE: Here they are: https://gab.com/JoeyCamp2020/posts/112337706493582419