It is quite common for those who have married to require a copy of the marriage certificate at a later date, especially for bureaucratic processes in another country.
Of course, when the time comes, it is not unusual to be unable to locate the verified copies of the certificate that you had so carefully set aside all those years ago!
Making an application for a marriage certificate can be problematic if you do not have a reasonably good command of the language of the country in which you got married. A simple and efficient option is to hire a local legal expert to manage this for you.