Do a note that, contract is not 100% safe, they can still do worse. What's good in contract is we know whos the real person, and it can help us in future the investigation.
Step 1 - Provide Handwritten Contract
Step 2 - Provide Clear Copy of your Valid ID
Step 3 - Provide a selfie while holding the Valid ID & the Contract Paper
Final Step - Give all the documents above to your Legit Middle Man (YostakaMM)
Only the middleman will hold those private details, for seller privacy purposes.