I thought I must give an update on this; I was away for a vacation for a month and back couple of weeks back - yes with my new born and family
My son's TRV was approved without any issues. It took only 6 or 7 days to get the approval (applied online). Thanks to everyone in this forum who helped by answering my questions.
I had applied only for 6 months visa for him coz we hadn't done medical for him at that time. However when landed based on his PR application status etc. border officer gave 1 year Visitor record. (Interestingly his Visa expiry was until his passport expiry, that is 2020. But I was sure that at border they would give a different date)
When I applied a visitor visa for him, I too see a lot of negative stories on this hence was very skeptical about this. At the same time I thought
people will mostly discuss failure stories (to find a solution etc.), hence there must be success stories also out there. I believe my assumption was correct, yes my son granted a visit visa while his parents are on PR. However I had clearly mentioned my story (how he happened to born in India etc.) in the invitation letter.
I hope this update will help someone in the same situation. Some of the points:
1) Clearly mention your situations in the invitation letter or letter of explanation.
2) Start PR process as well for your child and in your explanation letter mention this and provide a copy of your CIC fee paid receipt (you will have only this proof, if you are applying immediately for visa after PR application. Else you can give AOR etc.)
2) Better apply online, complete/provide all documents they ask. I usually add simple cover letter with each proof I added to explain what it is. Then make it as a single PDF (like cover letter in first page and proof in second one). If some docs are not relevant or needs explanation we can explain things this way.
3) Never ever mention any medical condition as the reason for your child's birth in India.
4) Your financial proofs are very important. In addition to the T4 and Pay stubs I had also given bank statement.
5) I believe it is better to have a very good job/ income source as proof. If you don't have these better not to apply until you get a job.
You may see a lot of negative story, don't bother, try your best!
I had also started hi PR process at the same time. Now my sponsorship has been approved and they forwarded PR application to New Delhi (India) for further processing.
So good luck!
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