Can a minor swear an Affidavit?

Based on literature from the Canadian Bar Association (2019), for something non-contentious, 14 years old is the youngest acceptable age for someone to testify via an affidavit.

However, the circumstances can differ greatly depending on the unique situation. 

Factors like age and maturity, the ability of the child to express their preferences, the nature of the affidavit or evidence, and the child’s willingness to provide an affidavit are all important considerations to be made by your lawyer or other legal professional.