The way insurance pays when there are multiple insurance involved is the same for all insurance across Canada. This is dictated by the Canadian Life and Health Insurance Association’s (CLHIA)
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SHARE CUSTODY When both parents have plans and their children are covered under both asdependents, the plan of the parent with the earlier birth date in the calendaryear pays first.
Example 1:• Father’s birthday – October 11• Mother’s birthday – September 21Therefore - Mother’s plan pays first - Mother’s birthdate comes before Father’s inthe calendar year.
If both parents have the same birth date, the plan paying first is based on theparent’s given name that occurs first in the alphabet.
Example 2:• Mom’s given name is Jane• Dad’s given name is StephenTherefore - Jane’s plan pays first - the name Jane comes first alphabetically.
In cases of Single Custody i.e., when one parent has custody of the child(ren),
The plan of the parent with
whom the child resides,
i.e., the plan of the parent withcustody, pays first.
The plan of
the spouse of the parent with custody pays second.
The plan of the parent
not having custody pays third.
Example 3:A child lives with mother and her new spouse.Therefore - Mother’s plan pays first.
Mother’s spouse’s plan pays second.
Father’s plan pays third.
In a case of sole custody, it's not the DOB that are important, it's mom then partner (if applicable) then dad, then partner (if applicable)
See this link for complete document:
Brochure_Guide_To_CoOrdinationBenefits_ENG.pdf (clhia.ca)