The U.S.-Greek agreement requires each country to issue certificate of coverage forms
for workers who, without the agreement, would have to pay social security taxes to
both countries on the same earnings. The certificate serves as proof that the worker
named on the certificate is:
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•
subject to the social security taxation and coverage laws of the country issuing the
certificate; and
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•
exempt from social security coverage and contributions on the same earnings in the
other country.