Hi, I have the same issue, did you mention those employment in the personal history? someone told me I should mention them in both work and personal history, but because they were part time and small projects with different people, I cannot provide any documents, do I still need to provide those for the CIC and mention both at the work history and personal history? I really appreciate if you tell me how you solved the issue for yours? Thanks
You are not required to provide proof of employment for anything listed in the 'personal history' section.
And yes, you can list employment in the 'personal history' section that you didn't list in your 'work experience' section.
IRCC doesn't expect you to list every aspect of your work experience in the 'work experience' section - only the work experience for which you're claiming points in your CRS Score (which is why you have to provide documented proof i.e. the employment reference letters).
In my personal assessment of why IRCC does things this way:
Not everyone is going to have a complete work history where every single experience meets the requirements for claiming points (e.g. some of your work history could be under NOC Skill/level C which doesn't qualify as skilled work, or some of your work experience might be completely irrelevant to your 'intended work' if you move to Canada), so requiring applicants to give their entire work history under the work experience section would just require IRCC to verify irrelevant employment experience, during their assessment of whether you claimed the right number of points and to see if you have enough experience in your field to be a worthwhile addition to the Canadian labour force.
Meanwhile, I suspect the personal history serves a different purpose - this section is meant to provide information to facilitate IRCC's background checks, which is why you want to include EVERYTHING under this, including ALL work history in the last 10 years, whether or not you previously mentioned it under work experience.