Hi Debra,
Thank you for your response. I am aware of what you're saying. It's just that I have been visiting authorities and local registry offices for about two years and have not found anything. Additionally, in my papers she is written down as the mother. Despite this, authorities here in Greece are not willing to help me find her whereabouts. If she is alive she will be 91 this year, so there is a possibility that she is not alive anymore. As a result, I was advised to search for a death certificate online.
Eleanna