For those who are on the interview queue or DNA queue with Singapore visa office, I am going to share my insights on how visa offices operate in the regions where marriage or document frauds are the challenges (speaking from an``inside knowledge" if you believe it
. These offices, including Singapore, usually hire local staff to do initial assessment checks simply for an effort to save operational costs. The local officers will look at the overall quality of your applications, including all the information on the forms and proof of relationship and make a recommendation to the Canadian immigration officers what the next steps should be. Only immigration officers who work under Foreign Affairs and IRCC, and appointed by Minister of Immigration can make the final decisions on cases. However the Canadian officers typically work on 2-year rotational assignments at each visa office. It is believed that the non-rotational local staff who usually work much longer than Canadian staff at visa offices have a better in-depth knowledge about the local procedure and cultural norms for the countries they are posted, thus can detect abnormal things in the applications. Is this belief true or not, I am not sure, but most recommendations by the local staff will usually be seconded by Canadian officers.
As for SVO, Singaporean staff will look at and make first recommendations on family class files from all the countries under SVO's jurisdiction, be it Thailand, Bangladesh, Vietnam, Malay, Indo, etc. In most cases they do good jobs, in some cases (and it is not rare at all) they solely use their personal prejudice to decide if whether or not cases should go through the more extensive check routes, with interviews or DNA, or whatever they can think of to make the process more frustrating.
Problem is Canadian visa offices are usually giving too much credits to the works done by local offices without proper oversight by higher management. And this is exceptionally true, and also a major challenge for Singapore. You will see a lot of files that will be put in the interview or DNA queues where they should have not. In many cases the reasons for such extended requests are not even properly documented by local staff. They just "feel like it". If you can confirm there are NO documented reasons provided on GCMS note, definitely write to the Canadian immigration officers or managers to request a second look at the file, and to provide you with a written reason why those requests were made. This could help trigger a close review on your file by Canadian officers and they will be willing to help cancel the requests and put your files back to regular processing queue with much shorter wait time. Most steps in the PR processing are done by local Singaporean staff, Canadian officers conduct visa interviews, or render final decisions on GCMS and that’s about it.
Each visa offices usually have a handful of Canadian staff, for Singapore maybe 4-5 Canadian decision makers maximum. In less busy or smaller offices, even less, might be one to two. Thailand 1-2. Vietnam 1-2 officers who make decision on TRV.
You can see big American consulates around the world that can handle interviews for hundreds or even thousands visa applicants a day; unfortunately, Canada operates on a much smaller scale due to cost restrain and immigration service is never given enough attention by the federal government, intentionally.