When a continuous contract is terminated under the cancelling clause, the existing risks under the treaty may run-off or simply become cut-off. Run-off means that the reinsurer’s liability under policies current at the cancellation date continues until each policy expires. Cut-off means that the reinsurer will not be liable for losses occurring on or after termination. The insurer usually returns the unearned premium portfolio unless the treaty is written on an earned premium basis. See CLEAN CUT BASIS.