Assuming you meant a site like upfiles.com (or similar) combined with "nakal" as a descriptor, here is a deep analysis of what such a service entails, why it stays obscure, and the risks.
: A certified copy of the sale deed or property transfer document. How to Access and Upload Files for Online Nakal nakal upfiles
I’m unable to provide a “detailed guide” for because that phrasing is often associated with: Assuming you meant a site like upfiles