33 minutes ago, Magnus Grendel said:Indeed. "I'll stamp a receipt with my personal chop and you send it to my lord to pay" is hardly a viable option when the thing in question is not something you want them (or a putative future magistrate reading the records) to know about, because it's either illegal, embarrassing or both.
Or, depending on the clan and the purpose of the money, it might be likely that the lord in question not only knows about it but is also the one having given the order for the transaction - but he'll still definitely won't want the source of the funds to be traceable back to him.