You're right that there are certain places where the information that may be available is less reliable, but our officers need to be satisfied that an individual is not inadmissible to Canada so that they don't pose any threat and they don't have any inadmissibilities.
Working closely with our security partners, such as CBSA and CSIS, as well as through our partnerships with our Five Eyes and other international partners, we're able to collect information that can help strengthen the inadmissibility assessment of any applicant.
If the officer is not satisfied, they can continue to ask for more information. For instance, they may require things such as police certificates, employment history or documents that will allow the officer to be satisfied that the individual does not pose a risk to Canada.
In addition to that, we collect biometrics. Biometrics are an important part of the immigration system, because they're not just for a security screening purpose where we're identifying if there's criminality; they're also to anchor identity. It's the first time we might see an individual, and using those biometrics and sharing those with our partners also helps us understand identity and determine if there's any derogatory information that exists on that individual.