Thanks. Yes, he will be moving on 26th August. Assuming if i get PR in next draw, I will wait till 26th and once my brother gets his documents (COPR signed by immigration officer), bank statement etc. i will submit them to IRCC. Hopefully, it should work out.
I will not advise you to consider encashing 15 additional Sibling points until your brother has landed in Canada for 2 reasons:
1. While assessing your application post ITA, the officer checks for the score you had at the time of ITA. During the check, since your had received ITA on 458 score on 7th Aug, the officer will proceed to check your Sibling docs, where it will appear that you have claimed your points without your brother landing in Canada. This can be taken as misrepresentation, that would be extremely bad!!
2. To claim Sibling points, please check the documents required. They mention PR card clearly, not even signed COPR is on their list. However, signed COPR ( Signed here means the stamp and sign on COPR done by immigration officer upon landing) is being claimed by many and has worked ( as I see on other threads). Further, for Sibling points, their requirements are Proof of Residency ( presently residing) , Proof of relationship and Proof of Citizenship/ PR.
Considering the above, I would suggest you to completely avoid claiming Sibling points till your brother lands. It will only be a matter of 20 days. Technically, you may upload it anytime after 27th Aug. Nowadays, people receive the PR card in months time, make sure he has a proper address to give on landing where they can dispatch it. And you could be good to go too.
Unless you are loosing points for Birthday in another 3-4 months, I don’t think 458 is a score to worry. You will get the ITA hopefully sooner or later. So take your call wisely.
Thanks.
PS: There are separate threads on this forums where you can check / cross check about Sibling points and questions similar to yours. Good luck!!