What is consideration?
Consideration is bargained for exchange involving a legal benefit to the promisor or detriment to the promisee.
Not doing something you are legally entitled to do is a legal detriment.
Promising to make a gift/conditioning gift ≠ consideration.
Four examples where there is no consideration (not consideration substitutes), and therefore K does not exist?
BUT: satisfaction Ks are not illusory; they can be breached by bad faith. Req/output Ks are not illusory; they can breached.
Can Ks be modified at CL?
Under the preexisting legal duty rule, a modification to a K must be supported by new consideration.
When is modification of a K permitted at CL?
Modification of debt obligation under CL:
If the debt is currently due and undisputed, then modification (in the form of promising partial payment for release from the debt obligation) is NOT binding.
If the debt is not due but renegotiated, the modification of debt is binding.
Modification in the UCC Universe
If the modification is made in good faith, it is binding even without any new consideration.