If you lost your certificate of documentation, then you will need to request an official replacement from Transport Canada. This is very important, since without an official copy of your registration, you can’t operate your vessel in Canadian waters. If you’d like to avoid this, use the replacement form here on our website to request your replacement. Within a few weeks, you should receive a new certificate that gets you on your way. However, if what you need to do is renew a certificate that has expired, then you won’t need a replacement but rather a renewal, which is a different process altogether.