(1) This section applies if—
(a) a document has been served on an offender for this chapter otherwise than by personal service; and
(b) the registrar is satisfied that—
(i) the document has not come to the knowledge of the offender; or
(ii) doubt exists whether the document has come to the knowledge of the offender.
(2) The registrar must not take any further action under this chapter in relation to the offender unless—
(a) the document has been served again on the offender in the way the registrar considers appropriate; and
(b) the registrar is satisfied that the document has come to the knowledge of the offender.