1) Section10A of the Information Technology Act, 2000 validates electronic contracts and e-signatures,

2) Section 35 of the Indian Stamp Act, 1899 explicitly bars courts from admitting any unstamped or under-stamped document into evidence. This makes paying the required stamp duty mandatory for actual legal enforceability

3) You must pay the stamp duty. You can clear the defect later by paying a penalty (which can reach up to 10 times the original shortfall), but the agreement will not be enforceable until that penalty is resolved

4) Only the principal document needs to bear the primary stamp duty. In your setup, you should choose one state (e.g., Delhi, where your company might be headquartered) to serve as the location of the primary execution. 

5) The other copies are legally viewed as "counterparts" or "duplicates." Under state laws (such as Article 24 of the Maharashtra Stamp Act), duplicates only require a nominal rate (often a flat ₹100 or a minimal fixed fee) provided the stamp certificate notes the certificate number of the fully stamped Delhi principal copy.

Executing agreements completely paperless across multiple states in India is  legally recognized, but navigating the intersection of electronic signatures and state stamp acts requires precision. Under Section 10A of the Information Technology (IT) Act, 2000, electronic contracts are legally valid and cannot be denied enforceability solely because they were executed digitally. While your Aadhaar-based e-signature makes the NDA valid, Section 35 of the Indian Stamp Act, 1899 dictates that any instrument not "duly stamped" is inadmissible as evidence in a court of law.  If a future cofounder or employee breaches the NDA and leaks your prototype, you cannot use that unstamped e-document to secure an injunction or damages in court without first paying the deficient stamp duty along with a hefty penalty of up to 10 times the original duty. Therefore, stamping is practically mandatory for  legal protection.

Since your company is pre-incorporation and you (the Disclosing Party) are located in Delhi, while the Recipient signers are executing from Maharashtra and Karnataka, this is considered an inter-state transaction.

You do not need three different state stamp papers for one agreement. Instead, you follow the rule of the highest stamp duty among the executing states. 

You may go for a digital e-Stamp paper for the highest common value—typically ₹500 under the Delhi jurisdiction or the state where the primary obligation rests (your location as the owner of the IP). Stamping it at the highest rate prevents any party from claiming the document is "insufficiently stamped" under their respective state's laws if litigation arises locally.

Dear Sir/Madam,

An NDA can be legally executed electronically. However, an e-signature does not replace applicable stamp duty; an insufficiently stamped NDA may be impounded and ordinarily cannot be relied upon in court until the deficit duty and penalty are paid.

Stamp duty applies to each NDA according to the State where it is first executed. If it is later received or acted upon in Maharashtra or Karnataka, differential duty may be payable there if the local rate is higher; therefore, Delhi stamping for all NDAs is not automatically sufficient.

Prepare a separate NDA for each person, specify its place of execution, obtain the appropriate State e-stamp before signing, and execute it through Aadhaar eSign/DSC with a proper timestamp and audit trail. Confirm the exact stamp article and rate with the concerned State stamp authority before execution.

Advocate Saurabh Agrawal

An electronically executed Non-Disclosure Agreement (NDA) is generally valid and enforceable in India, provided it satisfies the requirements of the Information Technology Act, 2000 and the Indian Contract Act, 1872. An NDA is a contractual document, and there is no legal requirement that it must be physically signed merely because it is executed electronically. An electronic signature, such as an Aadhaar e-Sign or a Digital Signature Certificate (DSC), is legally recognised and is capable of creating a binding and enforceable contract.

However, it is important to distinguish between execution and stamping. While an e-signature is sufficient to establish a valid agreement between the parties, stamping is a separate requirement governed by the applicable State Stamp Act. Depending on the nature of the NDA and the relevant State law, the agreement may attract nominal stamp duty. Although an unstamped or insufficiently stamped NDA is not necessarily void, it may face objections when produced as evidence before a court, and the deficient stamp duty together with any applicable penalty may have to be paid before the document is admitted in evidence. Therefore, as a matter of prudence, it is advisable to ensure that the NDA is duly stamped.

With regard to the applicable stamp duty, the governing principle is generally the place where the instrument is first executed or the provisions of the applicable State Stamp Act. Since you are based in Delhi and are the disclosing party, if the agreement records Delhi as the place of execution, provides that it is governed by Delhi law, and confers jurisdiction upon the courts at Delhi, the applicable stamp duty under the Delhi Stamp Act would ordinarily apply. The fact that the recipients are situated in Maharashtra and Karnataka does not automatically require separate stamping under the laws of those States merely because they execute the document electronically from their respective locations.

The recommended process would be to first finalise the NDA with appropriate clauses specifying Delhi as the governing law and conferring exclusive jurisdiction upon the courts at Delhi. Thereafter, obtain the appropriate e-stamp under the Delhi Stamp Act, incorporate the e-stamp certificate into the final version of the agreement, and have all parties execute the same electronically using Aadhaar e-Sign or a valid Digital Signature Certificate. The final electronically signed agreement, together with the e-stamp certificate, execution logs, email trail, and any audit trail generated by the e-sign platform, should be safely preserved as evidence of execution.

Since you are in the process of onboarding a technical co-founder and employees for a technology startup, it is also important to note that an NDA alone may not adequately protect your intellectual property. In addition to the NDA, you should execute a comprehensive Founders' Agreement and an Intellectual Property Assignment Agreement to ensure that all source code, software, inventions, designs, confidential information, and other intellectual property created by the co-founder or employees vest in, or stand assigned to, the company upon its incorporation. This provides significantly stronger legal protection than an NDA alone.

Accordingly, while a digitally executed NDA is legally valid, it is advisable to ensure that it is appropriately stamped and supplemented by proper IP assignment documentation to comprehensively safeguard your startup's intellectual property and confidential information.

No if it’s digitally signed then you don’t need stamping 

Include a governing law clause (e.g., Indian law) and jurisdiction clause.

You must specify the place of execution in the agreement (for example, Delhi); 

The applicable stamp duty would ordinarily be payable under the Delhi Stamp Act. 

The place of execution clause is strong evidence, but it is not necessarily conclusive as the issue may become fact-specific in a contested case. 

Dear Client, Executing NDA’s digitally is a standard and legally valid practice in India provided you follow the right procedural steps Firstly stamping is mandatory for a document to be admissible as evidence in an Indian court while an unstamped NDA remains a valid contract between parties it cannot be used in legal proceedings until the stamp duty plus any applicable penalty is paid under Section 35 of the Indian Stamp Act courts are required impound documents that are not properly stamped therefore to ensure your NDA is fully compliant and enforceable without further hurdles you must pay the stamp duty however E signatures are fully recognized under the Information Technology Act of 2000 and are legally equivalent to ink signatures.

Secondly stamp duty is a state subject and rules vary across India generally you should pay the stamp duty of the state where the document is executed A document is considered executed when all parties have signed it if your Co founder and hires are signing from Maharashtra and Karnataka those states may technically claim jurisdiction over the stamp duty for their respective copies To stay safe and compliant it is standard practice to pay the stamp duty for the state where the disclosing party is located or where the document is deemed to be first executed.

To get this fully compliant and paperless ensure your NDA includes clear definitions of confidential information the term of the agreement and a governing jurisdiction clause Further use a service that supports digital stamping these platforms allow you to pay the state specific stamp duty online and generate a Digital E Stamp certificate and lastly ensure the final signed document includes the signing certificate provided by the esign platform. I hope this answer helps, if you have any further query kindly do not hesitate to contact us. Thankyou

(1) Is stamping mandatory for enforceability, or is e-signature alone sufficient?

E-signature alone is not sufficient for full legal protection. Under Section 10A of the Information Technology Act, 2000, electronic contracts are legally valid and cannot be denied enforceability solely because they were executed digitally. However, Section 35 of the Indian Stamp Act, 1899 explicitly bars courts from admitting any unstamped or under-stamped document into evidence. This means that while your e-signed NDA is a valid contract, you cannot use it in court to seek an injunction or damages if breached—until you pay the deficient stamp duty along with a penalty of up to 10 times the original duty. Therefore, stamping is practically mandatory for true enforceability.

(2) Which state's stamp value applies to each copy?

For inter-state transactions, you do not need three different state stamp papers. The rule of "highest stamp duty among the executing states" applies. Since you (Delhi) are the disclosing party and the recipients are in Maharashtra and Karnataka, you should stamp the principal document at the highest rate among the applicable states—typically around ₹500 under Delhi jurisdiction. The other copies are treated as "counterparts" or "duplicates" and only require a nominal rate (often a flat ₹100 or minimal fixed fee) provided the stamp certificate references the fully stamped principal copy. Stamping at the highest rate prevents any party from later claiming the document is under-stamped in their state.

(3) The correct end-to-end process to get this fully compliant and digitally executed.

Step 1: Draft the NDA clearly identifying parties, confidential information, obligations, and governing law (choose Delhi as the place of execution).

Step 2: Pay the stamp duty via e-stamping (available in Delhi, Maharashtra, Karnataka). Generate the e-stamp certificate for the principal copy at the highest rate (approx. ₹500).

Step 3: Affix the e-stamp certificate to the principal NDA document (print the digitally stamped certificate and attach it to the e-document, or use an e-stamping platform that integrates with your e-sign tool).

Step 4: Have all parties sign the NDA using a valid e-signature under the IT Act (e.g., Aadhaar-based e-sign or digital signature certificate from a licensed Certifying Authority).

Step 5: For the counterpart copies sent to Maharashtra and Karnataka, attach a nominal stamp (₹100 or as per local rules) with a reference to the principal copy's stamp certificate number.

Step 6: Store the final signed versions with audit trails and timestamp records for evidentiary purposes.

Dear Sir/Madam,

It is suggested that you prepare the agreement and send them (02 parties for change/confirmation). After all the clauses are confirmed, send the final copy to them and ask the signed copy from them in 03 copies. Circulate the copies in such a manner that all 03 copies of the agreement has original signaures of all the parties. Use the legal value of stamp used in Delhi becuase you are the Principal from Delhi. After doing the same, u can take help of e-notary for authorisation.