(1) Where the contract requires payment before inspection non-conformity of the goods does not excuse the buyer from so making payment unless\n(a) the non-conformity appears without inspection; or\n(b) despite tender of the required documents the circumstances would justify injunction against honor under the provisions of subsection (b) of section 5–109.\n(2) Payment pursuant to subsection (1) does not constitute an acceptance of the goods or impair the buyer's right to inspect or any of his remedies.
Massachusetts Legal Code