For the Hong Kong Police Certificate, there really isn’t too much to say on the application because HK police department is really clear and efficient on what needs to be provided. Relative links are here:
One thing that could create confusion is the mailing address of the IRCC case processing center. As you know the Hong Kong police department by regulation cannot issue a certificate to the applicant, instead it has to be mailed to the immigration office directly. Firstly of all, you have to find out which office is processing your case. For example my case is being processed by the Ottawa office. While I searched the internet to find the correct address, there were some misleading ones like below:
219 Laurier Avenue West, 7th floor, section B, Ottawa, ON, Canada, K1A 1L1
Note: the above address is the WRONG address. I called the 219 Laurier Avenue West, turns out that was the OLD address of IRCC and it’s currently under construction as of Apr 2017. Sending mails there will not get your mails delivered to IRCC.
The new and correct address of IRCC Ottawa case processing center is:
365 Laurier Avenue West, Ottawa, ON, Canada, K1A 1L1
Typically it takes four calendar weeks for the mail to be delivered. So once IRCC grands you with 60 days till the deadline, you’d better apply no later than 30 days since the request.
Note: this blog is posted on Apr 2017 and please double check if they updated the mailing address