Electroconvulsive therapy (ECT) is a highly effective treatment for depression. Continuation ECT (C-ECT) is indicated for patients suffering from severe, recurrent or treatment-resistant forms of depression who have responded to an index course of ECT. This review aims at giving an updated set of guidelines for the use of C-ECT for patients suffering from depression. The guidelines will describe which patients are likely to benefit from the treatment, what to consider before administering the treatments and potential adverse effects.