Is it PO box good for registering your business and opening up a business account at the bank and applying for a business license in Ontario?

Is it PO box good for registering your business and opening up a business account at the bank and applying for a business license in Ontario?
The Government will require both a mailing and Phisical address.Meaning you can get your mail sent to a PO box but the Governmentwants to know where the Leagle business Documents are.