Dear @Husnain,
Welcome to our interactive platform and thank you for reaching out to us.
Your question has already been asked and answered a few times on our platform, please have a **** at the detailed descriptions on the following threads:
Can I get married in Greece although my asylum case is incomplete?
Can a refugee get married in Greece with an EU citizen?
How to marry in Greece ?
There are a few websites linked on these threads as well, listing all the required documents and things you should be aware of.
I hope this helps. Please reach out to us again if you need any further assistance!
All the best,
Isa