Can the married couple take the marriage certificate and file it themselves at a later date?

Yes, a married couple can take their marriage certificate and file it themselves at a later date, depending on the specific laws and requirements of the jurisdiction where the marriage took place. However, it's important to ensure that they follow the correct procedures and deadlines for filing to ensure their marriage is legally recognized. Consulting with the local vital records office or a legal expert can provide clarity on the necessary steps.