If you have volunteers working for your campaign, the value of their volunteer labour is not considered to be a contribution.
A cash donation of $25 or less received at a fundraising event is not considered to be a contribution, and you may accept such donations without keeping track of who gave them to you. You will have to report the total amount of money that you received from these donations on your financial statement.
The value of free political advertising provided that such advertising is made available to all candidates and is in accordance with the Broadcasting Act (Canada) is not considered to be a contribution.
If you obtain a campaign loan from a bank or a recognized lending institution, the amount of the loan is not considered to be a contribution.