Hi Brianna! I have begun to gather documents for the application of my mother's TRV. I have a couple of questions regarding the process. On the document checklist they require the submission of a marriage certificate. My mother has been a widow for the past ten years and unfortunately her marriage certificate got destroyed in a flooding. The municipality doesnt have a copy of it. Is the marriage certificate a must in the application or should I write in the cover letter explaining the missing document?