any experience that you are entering in work experience section, you need to provide reference letters. And yes, your application can be rejected if the officer doesn't find your supporting documents complete.
hanin142 said:
Hi Vishal,
this is a worry for me then. Whats your source for this info? Would you provide the links/post regarding the same.
This is correct, read through this:
http://www.cic.gc.ca/english/resources/tools/perm/express/intake-complete.asp
Enter only what you are claiming points for and have reference letters for in employment history. Enter the rest in personal history where no evidence is required.
All the best