Tamasic surrender is when one says, "I won't do anything; let Mother do everything. Aspiration, rejection, surrender even are not necessary. Let her do all that in me."
Active surrender is when you associate your will with the Divine Will, reject what is not the Divine, assent to what is the Divine. Passive surrender is when everything is left entirely to the Divine—that few can really do, because in practice it turns out that you surrender to the lower nature under pretext of surrendering to the Divine.