Affirmative defesnes 8(c)(1): accord and satisfaction, arbitration and award, assumption of risk, contributory negligence, discharge in bankruptcy, duress, estoppel, failure of consideration, fraud, illegality, injury by fellow servant, laches, licenses, payment, release, res judicator, statute of frauds, statute of limitations, waiver.
A plaintiff may amend its complaint within 21 days of service upon the defendant. After that, a plaintiff may file leave too amend.