noun
certificate of legal capacity to contract marriage; certification of eligibility to marry
Official document issued by a government authority, often required when a foreign national marries in another country, confirming that the person meets the legal requirements to marry under their home country's laws.
国際結婚の手続きで、婚姻要件具備証明書の提出を求められた。
In the process for an international marriage, I was asked to submit a certificate of legal capacity to contract marriage.
婚姻届 is the marriage registration form submitted to a Japanese municipal office, while 婚姻要件具備証明書 is a certificate of legal capacity to marry, often used in international marriages.
Compound of 婚姻 (marriage), 要件 (requirements), 具備 (possession, fulfillment), and 証明書 (certificate). The term is a direct translation of the legal concept 'certificate of legal capacity to contract marriage'.