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Documentation Required to Enroll Dependents | |
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Spouse (opposite sex) |
State-certified marriage certificate |
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Benefit-eligible Costco Employee Spouse (opposite sex) |
State-certified marriage certificate and Decline-Coverage form completed by benefit eligible employee spouse |
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Dependent Child (up to age 19) |
State-certified birth certificate |
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Dependent child (age 19 up to age 23) |
State-certified birth certificate and proof of full-time student status. For details of student status verification, click here. |
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Step-child |
State-certified birth certificate, Declaration of Plan Eligibility for Step-child form and marriage certificate. Proof of full-time student status also required if age 19 to 23 |
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Legal guardian |
Declaration of Legal Guardianship form and documentation required by the declaration. Proof of full-time student status also required if age 19 to 23 |
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Domestic partner and domestic partner's child(ren) |
Declaration of Domestic Partnership and documentation required by the declaration. Birth certificates are required for children of domestic partner as well as proof of full-time student status if age 19 to 23 |
If you do not have your child's state-certified birth certificate or a state-certified marriage certificate, click here for more information.
About Step-children
If you have a step-child, you may enroll him or her for Costco benefits. You'll need to meet certain requirements that are spelled out in the Declaration of Plan Eligibility for Stepchild.
For complete information, ask your location's payroll or benefits representative for a copy of the Declaration of Plan Eligibility for Stepchild. You may also click to view and print these forms.
About Legal Guardianship
If you have legal guardianship of your grandchild, sibling, niece or nephew, you may enroll him or her for Costco benefits. You'll need to meet certain requirements that are spelled out in the Declaration of Legal Guardianship.
For complete information, ask your location's payroll or benefits representative for a copy of the Declaration of Legal Guardianship. You may also click to view and print these forms.
About Domestic Partners
You may enroll your domestic partner and his or her children for Costco benefits. Your domestic partnership must meet certain requirements that are spelled out in the Declaration of Domestic Partnership. This is a form you'll need to sign and return, along with proof of your partnership, when you enroll.
For complete information about enrolling a domestic partner, ask your location's payroll or benefits representative for a copy of the Domestic Partner Overview and Declaration of Domestic Partnership. You also may click to view and print these forms.
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