Meet the requirements in its own country
USA - organizations must be (i) registered with the IRS as exempt from federal income tax under Section 501(c)(3) of the US Internal Revenue Code, or (ii) a group exempt organization with proven affiliation to a central nonprofit that has 501c3 status.
Canada - the organization must be registered as a (i) Charity with the Canada Revenue Agency (CRA), (ii) Nonprofit operating entity with tax exemption, (iii) Federal or Provincial nonprofit corporation.