Template:Isda 10(b) summ
The one place where all this lofty talk about “legal personhood” and “it not mattering a jot which part of a corporate organisation makes the promise to be bound by the contract” falls about is when it comes to taxation. Taxation authorities don’t care about holistic entities, only the bits of them that are in their jurisdiction and over whose income and outgoing they have power to tax.
So, while it might not matter to you or your counterparty which bit of your organisation “did the deed” or “reaped its rewards”, it will matter to their respective tax departments, and the taxing authorities to which appendages of the entity are beholden. Yes, the net tax burden on the whole entity is the same, but one still tries to “optimise” that burden as best one can, by arranging things to be as far beyond the reach of nefarious excise authorities as can be plausibly arranged. Don’t @ me folks: I don’t make the rules.