If your family doesn't own any property, you can mention "Nil" or "No Property" in the property column of the EWS (Economically Weaker Section) certificate.

However, it's essential to provide supporting documents to validate your claim. These documents can include:

1. *Affidavit*: Create an affidavit stating that your family doesn't own any property.

2. *Income Certificate*: Provide an income certificate, which is also required for the EWS certificate. This document contains information about your family's income.

3. *BPL (Below Poverty Line) Certificate*: If you have a BPL certificate, it's also valid for the EWS certificate.

These documents prove the authenticity of your claim and help move forward the EWS certificate process.

Remember, having the right documents is crucial for the EWS certificate. If you don't have the necessary documents, your EWS certificate application might be rejected.