It is not necessary to be a citizen of another country to renounce Canadian citizenship, however it would be foolish to do so. However, after you have resigned your Canadian citizenship, you are no longer entitled to it. You must apply in the same way that any other immigrant would.
In order to renew your passport, you will need to show that you have resigned your Canadian citizenship. If you have not yet done so, then you can submit an Application for Restoration of Citizenship to prove that you were unaware that you had lost your citizenship and therefore should not be punished for failing to renew your passport on time. A fee will need to be paid for this service.
Canadian citizenship is very difficult to lose, but easy to regain. Even if you were born in Canada, your parents could still be denied citizenship if they acquired their citizenship through marriage or otherwise without "good reason".
If you believe that you have lost your Canadian citizenship, then you must file an application with the Department of Foreign Affairs to have it restored. There is a process involved with this which includes having a cost incurred before your citizenship can be restored.
Canadian citizenship is important because it provides many benefits including visa-free travel, health care, education, employment opportunities, etc. It is therefore important to protect your Canadian citizenship by keeping it up-to-date by submitting a renewal application at least once every five years.
To be qualified to renounce your Canadian citizenship, you must be a Canadian citizen; establish that you are or will become a citizen of a nation other than Canada if your renunciation application is accepted; and comprehend the importance of relinquishing your Canadian citizenship.
In addition, you must not be convicted of an offence that would make you inadmissible to Canada.
Renunciation can be made at any time after becoming a citizen and before the end of your period of residency in Canada. The more you live here, the more time you have to renounce your citizenship. If you do not renounce your citizenship within the required time frame, it will be considered abandoned and will no longer be possible to renew it.
If you decide to renounce your Canadian citizenship, you will need to provide evidence of nationality with your application. This may include a birth certificate for each child born outside of Canada, as well as a passport or equivalent document for yourself. If you do not provide these documents, your application will be rejected.
At the moment, you cannot lose your Canadian citizenship unless you first renounce it or have it revoked. That means you can't lose your Canadian citizenship in the same ways you may lose your citizenship in other countries, such as failing to affirm your citizenship after a set length of time abroad. However, there are two exceptions where the Minister of Immigration, Refugees and Citizenship (IRCC) can decide to cancel your citizenship: if you are convicted of an indictable offence (a serious crime) or if you are linked to terrorism.
In general, being found guilty of an indictable offense will also result in having your citizenship cancelled. This includes violations of immigration laws such as applying for asylum outside of the required time frame or lying on your citizenship application. To be considered for revocation, the minister must believe that you pose a security risk to Canada. If this belief is confirmed, your citizenship will be canceled.
There are several factors that could lead the minister to believe that you are a security risk. For example, if you participate in activities that support terrorist organizations, such as taking part in violent protests or giving money to groups that the government considers terrorist organizations, then the minister could decide to revoke your citizenship.
It is important to note that being convicted of a criminal offense does not automatically result in your citizenship being cancelled. The minister can choose not to revoke your citizenship even if you are found guilty of an indictable offense.