I asked a lawyer a question

I asked a lawyer a question

He asked the lawyer: “Who should be the owner of the thing if Titius Mevius writes a poem, story or speech on parchment paper?” Give a reasoned answer.

Additional information:

After payment you will be available a link to the solution of this problem in the file of MS Word. It should be noted that the problem solutions put up for sale were successfully handed over in the period 2009-2019 and could be outdated. However, the general algorithm will always remain true.