condictio indebiti(римское право || The condictio indebiti is an action in civil (Roman) law whereby a plaintiff may recover what he has paid the defendant by mistake; such mistaken payment is known as solutio indebiti. wikipedia.orgLeonid Dzhepko)
estoppel by laches(An equitable doctrine by which some courts deny relief to a claimant who has unreasonably delayed or been negligent in asserting a claim. BL Alexander Demidov)