Gentlemanforyou:
Hello nairalanders , I got married in 2014 and in 2016 our registry certificate was missing while moving , please how can one get another one ?

Start by going back to that same registry to complain. There should be a way forward.

I work in a marriage registry,all you need to do is to get a sworn affidavit of loss of certificate take it the marriage registry then you make payment some can even tell you to write a letter after then they give you another certificate.
The registry must be the one that conducted the wedding for you