The attorney (and only the attorney) may renounce his or authority in a power of attorney at any time, see 163G(3a) Conveyancing Act 1919 in Schedule 1 Powers of Attorney Act 2003.
Staff processing information
A renunciation of an unregistered power of attorney by the attorney must be entered under the General Frame, ie code "G", with a Noting: "Renouncement of unregistered power of attorney dated by [name of attorney]". Enter the principal and the person renouncing as Vendors entries.