How do you post a letter to Lionel Messi?

To post a letter to Lionel Messi, you can address it to his club or management agency. For example, you might send it to Paris Saint-Germain (PSG) at their official address or to his agency, which represents him. Ensure you include your return address and use proper postage. Keep in mind that there's no guarantee he will read or respond to your letter.