Canada is one of the few countries with flexible immigration policies, however, all requirements must be satisfied, hence the need for proper attention when filling the application, because a minor mistake could deny you entry into Canada.
Having your application is not the end of the road, with the help of immigration/experts, you can appeal your case by preparing the right paperwork to prove your case.
You could be denied entry into Canada due to many reasons which could range from minor to major offenses, and the following could deny you entry.
Criminality: If you have been convicted of any crime punishable under Canadian laws regardless of where the crime is committed, or you have a pending criminal lawsuit, your application to enter Canada would be denied. This is a proactive step by the Canadian government to protect its citizens by ensuring criminals or immigrants who might pose a security threat are denied entry into Canada.
DUI/DWI which could be considered a minor offense elsewhere is a major criminal offense in Canada.
Health Status: If you are a carrier of a contagious disease or if your health is failing and would strain the social service and healthcare systems, your entry into Canada would be denied.
This is a proactive step by the Canadian government to keep its citizens safe.
Misrepresentation: Is an offense of giving an incorrect account or information and Canadians extol honesty and they are generally known for their politeness, misrepresentation could be seen as an intent to cheat and the Canadian immigration officials take this offense very seriously.
Although most misrepresentations are honest mistakes, it is advisable to pay close attention while filling your application to avoid misrepresentation.
Financial Grounds: One major requirement of traveling to Canada either alone or with your family is financial independence. Not satisfying this requirement could deny your entry into Canada.
Your Inability to cater for yourself and your family financially would cause a strain on taxpayers money, a scenario the immigration officials are trying to avoid.
Ensure your health status is great and would not pose any threat before you deciding your trip to Canada.
Security: if you are proven to have ties to radical or terrorist groups, your entry into Canada would be denied and your chances of re-entry would be non-existent in the future.
WHAT TO DO AFTER YOUR ENTRY TO CANADA IS DENIED
You still stand a chance of entering Canada despite being denied entry, with the help of an immigration professional/expert who would appeal your case to prove to the immigration officials that your visit is of greater importance than any associated threat.
However, depending on the reason you were denied entry, there is recourse to aid your application and with a little luck, you could be allowed entry into Canada.
If the reason you were denied entry is because of your inability to meet the financial obligations, it is important to appeal or reapply when you are certain of satisfying the requirement.
If you were denied entry based on criminal grounds, it is necessary to apply for criminal rehabilitation. Successful completion of a criminal rehabilitation will imbue confidence in the immigration officials that you are unlikely to re-offend, and the initial criminal records that prevented you from entering Canada will be cleared.
If you were refused entry on health grounds, your appeal must prove to the immigration officials that your visit does not pose any direct danger and would not cause a strain on the healthcare and social services.
Regardless of the reason you were denied entry into Canada, with a piece of compelling evidence via appeal and the help of an immigration expert, you may be allowed to enter Canada. If your circumstance is justified by the immigration official you could be issued a Temporary Resident Permit (TRP).