In fact, this address is the address of the receiving officer of Barcelona Club. They will check your letter first and then see if it is worth giving to the player. After giving it to the player, you may not get a reply. What I sent at that time was written in Chinese, English and Spanish. Finally received a reply with his signature!

Don't forget to ask him for some photos if you want to send them. There may be a signed photo. Also, you must write new ideas in your heart, otherwise you will not reach the player!