Stamp paper

1. It cannot be tampered.
2. Every E-stamp paper has a unique number.
3. You can check the authenticity of the E-stamp paper online.
4. Specific denomination is not required.

It is not an e-stamp paper. Just a regular one which is available at stamp vendors. My questions are:

1- Can this regular 'Indian non judicial' stamp paper be used for agreement purposes when the said agreement is done online?

2- Can one such regular 'Indian non judicial' stamp paper bearing the same handwritten serial number be used for agreement purposes of 2 totally different individuals?

For Example: Company A in agreement with Individual A for a certain amount of work to be completed and again the exact same stamp paper with the same handwritten serial number is used by Company B in agreement with Individual B for a certain amount of work to be done.

Appreciate your time and support. Please guide.