March 18, 2020
September 11, 2013
October 27, 2013
Most national (at least) FIs such as banks should allow one to keep a bank account while a non-resident for tax purposes (but will withhold non-resident withholding tax on interest). I don't know about CUs but I assume they would permit it (members going ex-pat and all that).
Regardless, as post #2 says, you need to ask them before becoming a non-resident so that you can move your funds before you leave if you have to do so.
April 6, 2013
Legally, Canadian bank accounts can be held by a non-resident. But, banks are allowed refuse. Just like an RRSP can legally hold yen and euros. But, most RRSP issuers only allow Canadian dollars and maybe US dollars.
For example, in EQ Bank's FAQ, they do not allow non-resident holders:
Can I use EQ Bank if I live outside of Canada?
You can continue to access your existing account while travelling outside of Canada. However, all EQ Bank account holders must be Canadian residents in order to maintain their account.