Can the business manager sell the property of his or her principal, or any family member who does so on his or her behalf?

The business manager cannot sell on behalf of the seller, as no one can sell what is not his property and the business manager is not empowered to sell on behalf of his principal without any management.   The business manager can only buy on behalf of the principal without any management and cannot sell. And no family member can sell on behalf of his or her relative abroad, if he or she does not have the proper authorization through the mandate. Translated with www.DeepL.com/Translator (free version)