The letter template is a management method for storing documentation. For example, "the deed of gift" is more of a proof that something was given. to someone and are also used as a management tool. 


So Odyssey devised a unified method of management. Odyssey controls asset exchanges, hence a template of letters is required. So, in order to swap the Odyssey item, only two letters must be written (the deed of gift and the thank you letter).


The individual distributing the asset provides the gift deed.