This is how I had done:
After the child was born, I went ahead with obtaining his BC (birth certificate). The moment I received the BC, I sent a webform to IRCC informing about the birth of a new born and that I intend to add the child to my existing application. I received an acknowledgement from IRCC and I took the same acknowledgement for booking and performing the medicals of the child. The medical center probed me, but I answered them that I have an existing PR application and showed them the acknowledgement received from IRCC. It was smooth post that.
Mind you, once you send the webform and inform IRCC of your intention, they take 20-30 days to update your EE application and create one placeholder to update all the docs pertaining to child addition. You have to merge all the docs and upload in this newly created placeholder. If due to size restrictions u are unable to include all the docs in this kit, then you can send the remaining through a webform. You can, however, mention in your LOE that some associated docs are being sent through a webform. The documents would be:
- LOE / Cover letter
- Processing Fee for the child receipt
- Photo of the child
- Form IMM008 for the Primary Applicant. Need not be printed and signed, as you will be digitally signing it.
- IMM5406 for Primary applicant, Secondary applicant and any other applicant who is 18 yr old or more. IMM5406 needs to be filled in English and as well as your mother tongue. So, two copies of IMM5406 for each applicant - one in English and one in mother tongue. This has to be printed and signed by black pen.
- BC of the child
- Passport of the child
- Medical certificate of the child
Like if this helps. GL