update the cic as soon as there changes in circumstances. I am sure if you got a new a passport you would definately have an old passport with the old number on it. Otherwise if they old one got lost, there must documentation or any paperwork like reporting to police etc to get the new one. So you should nt worry.
hi,
as my passport was expired at the time embassy ask for it so
i renew my passport and same day and went to embassy got visa same day,
i attached my old one with new passport so all this happen same day,
