olemus
abielu registreerimist kinnitav dokument

Wiktionary
an official record indicating that two people got married on the date of the certificate

näiteid
https://www.riigiteataja.ee/aktilisa/0000/1324/3403/13260037.gif

https://duckduckgo.com/?q=marriage+certificate&t=h_&iax=images&ia=images

ülevaateid
https://en.wikipedia.org/wiki/Marriage_certificate

https://www.eesti.ee/en/family/marriage/formalizing-a-marriage/