Yes, the contracts must be enforced. Although it is not written, even writing to say oral CISG was still valid, however, may require additional evidence or witness prove that if a dispute occurs.
Yes agreements must be enforced Although it is not in writing. Despite oral CISG was still valid as well. However, May require additional evidence or witnesses dispute.
Yes, the contract must be enforced. Although it is not the writing, even speaking oral CISG still มีผลบังคับใช้ได้ as well, however, may have proven evidence. Or more witnesses. If disputes.