1. If there are changes in the agreement after it’s signed and it has to be executed again, can we reuse the old stamp via Leegality?

No.
Every new or revised agreement is treated as a new instrument under the Indian Stamp Act and state stamping laws.  Stamp duty is levied on each executed instrument, not on the underlying transaction.

So, if an agreement is re-executed (even for minor changes), you must affix a fresh stamp paper since there is now a new instrument.

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1. If an earlier loan agreement was executed for ₹10 lakh and later the loan amount is enhanced, can the difference in stamp duty be paid, or is a new stamp required?

It depends on your legal team’s view, but typically:

- A fresh agreement or addendum requires new stamp paper since it’s a new instrument.

- In some cases, only the differential stamp duty can be paid for the addendum’s incremental value — this must be legally vetted.

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1. I want to do NeSL stamping, but it’s not available in all states. What should I do?‍

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NeSL e-Stamping isn’t yet available in 4 Indian states.
To maintain a fully digital agreement flow across India, you can:

• Use NeSL stamping where available, and
• Digitize impressed stamps (physical stamp papers) in the remaining states to keep the flow paperless. 

Leegality allows you to do both under one platform - 

a) Go-live with NeSl 

b) Stamp digitally even in States where NeSL is not available yet. 

Read more here