Charles will travel to Poland to join other dignitaries and Holocaust survivors invited to a service at the Auschwitz-Birkenau museum and memorial.
The fly-half received a six-month ban and fines totalling £618 for the offences in Gloucestershire and London.
Eliza and Henrietta Huszti were last seen on CCTV on Market Street in Aberdeen in the early hours of Tuesday January 7.
Charles praised Glasgow’s rich culture, heritage and captivating history as it prepared to mark its anniversary.