How to Sign Any Document Without a USB Token
Quick Summary
You can sign any document without USB token on any device. Contracts, forms, invoices and letters can all be signed online. Upload your file to an eSignature platform like KAiZEN eSign, add your signature and send it by email or WhatsApp if others need to sign. You get a tamper-evident file and a full audit trail as proof. Below are four ways to do it, the steps, and how to choose the right one for your document.
What Does “sign without USB token” Mean?
A USB token is a small hardware device that holds the private key behind a Digital Signature Certificate (DSC). You plug it into your computer to prove a signature is really yours.
Now picture it is 6 pm and a client wants a signed agreement today. Your token is in a drawer at the office and you are at home. That is the problem with hardware: it gets lost, forgotten or broken, and you cannot plug it into a phone.
Signing without a token means the proof of who you are comes from somewhere else: an OTP, an Aadhaar check, a key stored securely online, or a record kept by the signing platform. That record shows who signed, when they signed and whether the file changed afterwards, and it is your evidence.
Is It Legal in India?
Yes, in most cases. The IT Act, 2000 recognises electronic signatures and electronic records, so for most business documents, such as sales contracts, offer letters, invoices and vendor agreements, an eSignature works well.
- Some documents need traditional signing. Wills, trusts and powers of attorney are the usual examples.
- Valid is not the same as accepted. A document can be legally valid and still be rejected by a portal or office that asks for a specific signature type, such as a DSC or Aadhaar eSign. Ask the receiver before you sign.
4 Ways to Sign Without a USB Token
Each method below covers how it works, the steps, who it suits and where it falls short.
Method 1: Use an eSignature Platform
How it works. You upload the document to an online platform, place your signature and, if needed, send it to others. The platform records who signed, when, and whether the file changed afterwards, and gives you the signed file with an audit trail.
- Upload the document. Add the PDF from your computer or phone.
- Place your signature and fields. Drag the signature box where it belongs, and add dates, initials or text fields if needed.
- Add other signers, if any. Set the signing order if it matters.
- Send the request. Share it by email, link or WhatsApp, depending on the platform.
- Download the signed file and its audit trail. Keep the two together.
Best for: everyday business documents such as sales contracts, offer letters, invoices and vendor agreements.
Falls short when: a portal or office specifically asks for a DSC or Aadhaar eSign.
A full walkthrough with KAiZEN eSign is further down.
Method 2: Use Aadhaar eSign
How it works. Your identity is verified with your Aadhaar number and an OTP sent to your Aadhaar-linked mobile number. No hardware and no certificate to install.
- Open the document on a service that offers Aadhaar eSign and choose it as the signing option.
- Enter your Aadhaar number and give your consent.
- Enter the OTP sent to your Aadhaar-linked mobile number.
- Download the signed document. The signature is applied once the OTP is verified.
Screen wording differs between service providers, but the order stays the same.
Best for: forms and processes that ask for Aadhaar eSign by name.
Falls short when: your mobile number is not linked to Aadhaar, or the receiver does not accept it.
Method 3: Use a Cloud DSC
How it works. Instead of keeping your digital key on a USB stick, your Certifying Authority stores it securely online. You approve each signature with a password or PIN and an OTP.
- Apply for a DSC from a licensed Certifying Authority and ask whether it offers a cloud or remote signing option.
- Complete identity verification and set your password or PIN.
- Open the document in the portal or signing tool that supports your Certifying Authority’s cloud signing.
- Select your certificate and approve with your password and OTP.
- Save the signed document.
Best for: portals and filings that need a DSC but where carrying a token is a problem.
Falls short when: the portal does not accept cloud-based signing, or your Certifying Authority does not offer it. Check both before you apply.
Method 4: Use a Digital ID Made in Adobe Acrobat Reader
How it works. You create a digital ID yourself inside the free Acrobat Reader. It shows the PDF was signed with that ID and has not changed since.
- Open the PDF in Adobe Acrobat Reader and go to the Certificates tool.
- Choose Digitally Sign and draw the signature area on the page.
- Create a new digital ID when asked, and save it to a file or your system’s certificate store.
- Enter your name and details, set a password and save.
- Sign and save the PDF.
Menu names vary slightly between Acrobat versions.
Best for: approvals inside your own team.
Falls short when: the receiver is outside your team. Because you made the ID yourself, their software will usually show it as unverified, so it is not suitable for official or legal work where a third party must confirm who you are.
How to Sign a Document with KAiZEN eSign (Method 1 in Detail)
You do not need training or any hardware. Here is the whole process.
- Upload your PDF. Add the file from your computer or phone.
- Place the fields. Drag the signature box where it belongs. You can also add dates, initials, approvals and custom text.
- Choose who signs. Sign it yourself, or add other signers. You can set the signing order and CC people who need to stay informed.
- Send it. Share the request by email or WhatsApp.
- Track and download. Watch the status live. When everyone has signed, download the final file and the audit trail.
On your phone: open the signing link or the app, tap the signature box, sign and save. KAiZEN eSign works on Android and iOS.
If the paper is only yours, use Self Signing. Upload it, sign it and download it. You do not have to send it to anyone.
What KAiZEN eSign Adds When You Go Token-Free
KAiZEN eSign is built for teams that are tired of slow signing. Here’s what makes it useful day to day.
- Sign from any device. Desktop, Android and iOS, plus a Chrome extension and an Outlook add-in, so there is no hardware to forget at the office.
- Requests that get noticed. Send by email or WhatsApp, so signers see the request quickly instead of leaving it in a pile.
- No dongle for Tally. If you use TallyPrime, the KAiZEN Tally plugin lets you sign invoices and financial statements digitally.
- Proof you can show. Every file is end-to-end encrypted from upload to the final signed copy, signed documents are tamper-evident, and each one comes with a downloadable audit trail.
- Pay only when you sign. Pay-per-usage pricing suits teams that sign a few documents a month, with your first 10 free.
- Many documents at once. Sign a stack of invoices or send one letter to a whole team in a single go. See bulk document signing.
- Fits your software. Connect Salesforce, TallyPrime, your CRM, HRMS or accounting tools through the API.
Common Mistakes to Avoid
Going token-free is easy, but a few small slips cause most delays:
- Using the wrong signature type. Some offices need a DSC or Aadhaar eSign, so confirm before you send.
- Missing fields. If a signature box is missing or in the wrong place, the signer gets stuck. Check the document before you send it.
- Not testing on mobile. Many people open signing links on their phones, so make sure the file looks good on a small screen.
- Forgetting to follow up. If someone hasn’t signed, send a quick nudge on WhatsApp.
- Losing the audit trail. Save the signed file and its audit trail together, since they work as a pair.
Ready to Leave the USB Token Behind?
Signing a document shouldn’t take days. It should take minutes. With KAiZEN eSign, you upload, sign and share from any device, with no token, no printing and no courier. Start a free trial now or book a demo and see how easy it feels and start your sign without USB token Journey.-
Frequently Asked Questions
What is the difference between an eSignature and a DSC?
An eSignature is the general word for signing electronically. A DSC (Digital Signature Certificate) is issued to a person or company for a higher level of identity checking.
How do I sign a document on my phone?
Open the signing link or app, tap the signature box, sign and save. KAiZEN eSign works on Android and iOS.
Can I sign Tally invoices without a dongle?
Yes, Install the KAiZEN Tally plugin and you can sign invoices in TallyPrime.
How much does eSignature cost?
With KAiZEN eSign you pay per usage, so you only pay for the documents you sign. The pricing page has the latest details.
Is it safe?
Yes, Files are end-to-end encrypted, signed documents show if anyone changes them, and you can download an audit trail for every document.
Sign up for Free
Trial today!
Try KAiZEN for free
Quick Summary
You can sign any document without USB token on any device. Contracts, forms, invoices and letters can all be signed online. Upload your file to an eSignature platform like KAiZEN eSign, add your signature and send it by email or WhatsApp if others need to sign. You get a tamper-evident file and a full audit trail as proof. Below are four ways to do it, the steps, and how to choose the right one for your document.
What Does “sign without USB token” Mean?
A USB token is a small hardware device that holds the private key behind a Digital Signature Certificate (DSC). You plug it into your computer to prove a signature is really yours.
Now picture it is 6 pm and a client wants a signed agreement today. Your token is in a drawer at the office and you are at home. That is the problem with hardware: it gets lost, forgotten or broken, and you cannot plug it into a phone.
Signing without a token means the proof of who you are comes from somewhere else: an OTP, an Aadhaar check, a key stored securely online, or a record kept by the signing platform. That record shows who signed, when they signed and whether the file changed afterwards, and it is your evidence.
Is It Legal in India?
Yes, in most cases. The IT Act, 2000 recognises electronic signatures and electronic records, so for most business documents, such as sales contracts, offer letters, invoices and vendor agreements, an eSignature works well.
- Some documents need traditional signing. Wills, trusts and powers of attorney are the usual examples.
- Valid is not the same as accepted. A document can be legally valid and still be rejected by a portal or office that asks for a specific signature type, such as a DSC or Aadhaar eSign. Ask the receiver before you sign.
4 Ways to Sign Without a USB Token
Each method below covers how it works, the steps, who it suits and where it falls short.
Method 1: Use an eSignature Platform
How it works. You upload the document to an online platform, place your signature and, if needed, send it to others. The platform records who signed, when, and whether the file changed afterwards, and gives you the signed file with an audit trail.
- Upload the document. Add the PDF from your computer or phone.
- Place your signature and fields. Drag the signature box where it belongs, and add dates, initials or text fields if needed.
- Add other signers, if any. Set the signing order if it matters.
- Send the request. Share it by email, link or WhatsApp, depending on the platform.
- Download the signed file and its audit trail. Keep the two together.
Best for: everyday business documents such as sales contracts, offer letters, invoices and vendor agreements.
Falls short when: a portal or office specifically asks for a DSC or Aadhaar eSign.
A full walkthrough with KAiZEN eSign is further down.
Method 2: Use Aadhaar eSign
How it works. Your identity is verified with your Aadhaar number and an OTP sent to your Aadhaar-linked mobile number. No hardware and no certificate to install.
- Open the document on a service that offers Aadhaar eSign and choose it as the signing option.
- Enter your Aadhaar number and give your consent.
- Enter the OTP sent to your Aadhaar-linked mobile number.
- Download the signed document. The signature is applied once the OTP is verified.
Screen wording differs between service providers, but the order stays the same.
Best for: forms and processes that ask for Aadhaar eSign by name.
Falls short when: your mobile number is not linked to Aadhaar, or the receiver does not accept it.
Method 3: Use a Cloud DSC
How it works. Instead of keeping your digital key on a USB stick, your Certifying Authority stores it securely online. You approve each signature with a password or PIN and an OTP.
- Apply for a DSC from a licensed Certifying Authority and ask whether it offers a cloud or remote signing option.
- Complete identity verification and set your password or PIN.
- Open the document in the portal or signing tool that supports your Certifying Authority’s cloud signing.
- Select your certificate and approve with your password and OTP.
- Save the signed document.
Best for: portals and filings that need a DSC but where carrying a token is a problem.
Falls short when: the portal does not accept cloud-based signing, or your Certifying Authority does not offer it. Check both before you apply.
Method 4: Use a Digital ID Made in Adobe Acrobat Reader
How it works. You create a digital ID yourself inside the free Acrobat Reader. It shows the PDF was signed with that ID and has not changed since.
- Open the PDF in Adobe Acrobat Reader and go to the Certificates tool.
- Choose Digitally Sign and draw the signature area on the page.
- Create a new digital ID when asked, and save it to a file or your system’s certificate store.
- Enter your name and details, set a password and save.
- Sign and save the PDF.
Menu names vary slightly between Acrobat versions.
Best for: approvals inside your own team.
Falls short when: the receiver is outside your team. Because you made the ID yourself, their software will usually show it as unverified, so it is not suitable for official or legal work where a third party must confirm who you are.
How to Sign a Document with KAiZEN eSign (Method 1 in Detail)
You do not need training or any hardware. Here is the whole process.
- Upload your PDF. Add the file from your computer or phone.
- Place the fields. Drag the signature box where it belongs. You can also add dates, initials, approvals and custom text.
- Choose who signs. Sign it yourself, or add other signers. You can set the signing order and CC people who need to stay informed.
- Send it. Share the request by email or WhatsApp.
- Track and download. Watch the status live. When everyone has signed, download the final file and the audit trail.
On your phone: open the signing link or the app, tap the signature box, sign and save. KAiZEN eSign works on Android and iOS.
If the paper is only yours, use Self Signing. Upload it, sign it and download it. You do not have to send it to anyone.
What KAiZEN eSign Adds When You Go Token-Free
KAiZEN eSign is built for teams that are tired of slow signing. Here’s what makes it useful day to day.
- Sign from any device. Desktop, Android and iOS, plus a Chrome extension and an Outlook add-in, so there is no hardware to forget at the office.
- Requests that get noticed. Send by email or WhatsApp, so signers see the request quickly instead of leaving it in a pile.
- No dongle for Tally. If you use TallyPrime, the KAiZEN Tally plugin lets you sign invoices and financial statements digitally.
- Proof you can show. Every file is end-to-end encrypted from upload to the final signed copy, signed documents are tamper-evident, and each one comes with a downloadable audit trail.
- Pay only when you sign. Pay-per-usage pricing suits teams that sign a few documents a month, with your first 10 free.
- Many documents at once. Sign a stack of invoices or send one letter to a whole team in a single go. See bulk document signing.
- Fits your software. Connect Salesforce, TallyPrime, your CRM, HRMS or accounting tools through the API.
Common Mistakes to Avoid
Going token-free is easy, but a few small slips cause most delays:
- Using the wrong signature type. Some offices need a DSC or Aadhaar eSign, so confirm before you send.
- Missing fields. If a signature box is missing or in the wrong place, the signer gets stuck. Check the document before you send it.
- Not testing on mobile. Many people open signing links on their phones, so make sure the file looks good on a small screen.
- Forgetting to follow up. If someone hasn’t signed, send a quick nudge on WhatsApp.
- Losing the audit trail. Save the signed file and its audit trail together, since they work as a pair.
Ready to Leave the USB Token Behind?
Signing a document shouldn’t take days. It should take minutes. With KAiZEN eSign, you upload, sign and share from any device, with no token, no printing and no courier. Start a free trial now or book a demo and see how easy it feels and start your sign without USB token Journey.-
Frequently Asked Questions
What is the difference between an eSignature and a DSC?
An eSignature is the general word for signing electronically. A DSC (Digital Signature Certificate) is issued to a person or company for a higher level of identity checking.
How do I sign a document on my phone?
Open the signing link or app, tap the signature box, sign and save. KAiZEN eSign works on Android and iOS.
Can I sign Tally invoices without a dongle?
Yes, Install the KAiZEN Tally plugin and you can sign invoices in TallyPrime.
How much does eSignature cost?
With KAiZEN eSign you pay per usage, so you only pay for the documents you sign. The pricing page has the latest details.
Is it safe?
Yes, Files are end-to-end encrypted, signed documents show if anyone changes them, and you can download an audit trail for every document.
Sign up for Free
Trial today!
Try KAiZEN for free