If you are not registered for direct deposit, and are expecting a refund, then a cheque will accompany your notice of assessment. The Notice of Assessment is showing what CRA officially accepts for your tax return, including any changes they may have made.
For more information on what is reported on a Notice of Assessment, please refer to this link:
http://www.cra-arc.gc.ca/gncy/ntcslttrs/n/menu-eng.html