How does signature verification work?

Verifying a signature will tell you if the signed data has changed or not. When a digital signature is verified, the signature is decrypted using the public key to produce the original hash value. The data that was signed is hashed. If the two hash values match, then the signature has been verified.

Is airSlate SignNow legally binding?

airSlate SignNow documents are also legally binding and exceed the security and authentication requirement of ESIGN. Our eSignature solution is safe and dependable for any industry, and we promise that your documents will be kept safe and secure.

How does signature airSlate SignNow verify?

Log in to your account or register a new one. Upload a document and click Open in airSlate SignNow. Modify the document. Sign the PDF using the My Signature tool.

How is online signature verification done?

Signature verification technology requires primarily a digitizing tablet and a special pen connected to the universal serial bus port (USB port) of a computer. An individual can sign on the digitizing tablet using the special pen regardless of his signature size and position.

Does a document need to be countersigned?

Most legal documents need to be signed and countersigned, but the signatures only apply to what's in the contract at the time of the signing; amendments to a contract that are added later have to be signed and countersigned as well, or they may not hold up legally.

Electronic Signature
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Certify Countersignature Required

Certify Countersignature Required with airSlate SignNow

Get rid of paper and automate digital document management for increased efficiency and limitless possibilities. eSign any papers from a comfort of your home, fast and feature-rich. Experience the perfect manner of doing business with airSlate SignNow.

Electronic Signature
Features
Other
Certify Countersignature Required

Sign documents online

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Collect payments & signatures

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Add wet ink signature online

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Sign documents on iPhone or iPad

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Award-winning eSignature solution

Upgrade your document workflow with airSlate SignNow

airSlate SignNow is a scalable solution that evolves with your teams and organization. Build and customize eSignature workflows that fit all your company needs.

View and download a document’s history to track all alterations made to it. Get instant notifications to know who made what edits and when.

airSlate SignNow easily fits into your existing business environment, helping you to hit the ground running right away. Use airSlate SignNow’s robust eSignature capabilities with hundreds of well-known applications.

Eliminate the bottlenecks associated with waiting for eSignatures. With airSlate SignNow, you can eSign papers in a snap using a desktop, tablet, or smartphone

For your legal safety and basic auditing purposes, airSlate SignNow includes a log of all changes made to your records, featuring timestamps, emails, and IP addresses.

Our top priorities are securing your records and sensitive data, and ensuring eSignature authentication and system defense. Stay compliant with market requirements and regulations with airSlate SignNow.

See airSlate SignNow eSignatures in action

Create secure and intuitive eSignature workflows on any device, track the status of documents right in your account, build online fillable forms – all within a single solution.

Try airSlate SignNow with a sample document

Complete a sample document online. Experience airSlate SignNow's intuitive interface and easy-to-use tools
in action. Open a sample document to add a signature, date, text, upload attachments, and test other useful functionality.

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airSlate SignNow solutions for better efficiency

Keep contracts protected

Enhance your document security and keep contracts safe from unauthorized access with dual-factor authentication options. Ask your recipients to prove their identity before opening a contract to certify countersignature required.

Stay mobile while eSigning

Install the airSlate SignNow app on your iOS or Android device and close deals from anywhere, 24/7. Work with forms and contracts even offline and certify countersignature required later when your internet connection is restored.

Integrate eSignatures into your business apps

Incorporate airSlate SignNow into your business applications to quickly certify countersignature required without switching between windows and tabs. Benefit from airSlate SignNow integrations to save time and effort while eSigning forms in just a few clicks.

Generate fillable forms with smart fields

Update any document with fillable fields, make them required or optional, or add conditions for them to appear. Make sure signers complete your form correctly by assigning roles to fields.

Close deals and get paid promptly

Collect documents from clients and partners in minutes instead of weeks. Ask your signers to certify countersignature required and include a charge request field to your sample to automatically collect payments during the contract signing.

Collect signatures

24x

faster

Reduce costs by

$30

per document

Save up to

40h

per employee / month

Our user reviews speak for themselves

Kodi-Marie Evans

Director of NetSuite Operations at Xerox

airSlate SignNow provides us with the flexibility needed to get the right signatures on the right documents, in the right formats, based on our integration with NetSuite.

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Samantha Jo

Enterprise Client Partner at Yelp

airSlate SignNow has made life easier for me. It has been huge to have the ability to sign contracts on-the-go! It is now less stressful to get things done efficiently and promptly.

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Megan Bond

Digital marketing management at Electrolux

This software has added to our business value. I have got rid of the repetitive tasks. I am capable of creating the mobile native web forms. Now I can easily make payment contracts through a fair channel and their management is very easy.

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Honest pricing for full-featured plans. airSlate SignNow offers subscription plans with no overages or hidden fees at renewal.
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Your step-by-step guide — certify countersignature required

Access helpful tips and quick steps covering a variety of airSlate SignNow’s most popular features.

Using airSlate SignNow’s eSignature any business can speed up signature workflows and eSign in real-time, delivering a better experience to customers and employees. airSlate SignNow countersignature required in a few simple steps. Our mobile-first apps make working on the go possible, even while offline! Sign documents from anywhere in the world and close deals faster.

Follow the step-by-step guide to airSlate SignNow countersignature required:

Log in to your airSlate SignNow account.
Locate your document in your folders or upload a new one.
Open the document and make edits using the Tools menu.
Drag & drop fillable fields, add text and sign it.
Add multiple signers using their emails and set the signing order.
Specify which recipients will get an executed copy.
Use Advanced Options to limit access to the record and set an expiration date.
Click Save and Close when completed.

In addition, there are more advanced features available to airSlate SignNow countersignature required. Add users to your shared workspace, view teams, and track collaboration. Millions of users across the US and Europe agree that a solution that brings everything together in one unified digital location, is the thing that businesses need to keep workflows performing smoothly. The airSlate SignNow REST API enables you to embed eSignatures into your app, website, CRM or cloud storage. Try out airSlate SignNow and enjoy quicker, smoother and overall more productive eSignature workflows!

How it works

Upload a document

Edit & sign it from anywhere

Save your changes and share

airSlate SignNow features that users love

Speed up your paper-based processes with an easy-to-use eSignature solution.

Edit PDFs
online

Generate templates of your most used documents for signing and completion.

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Create a signing link

Share a document via a link without the need to add recipient emails.

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Assign roles to signers

Organize complex signing workflows by adding multiple signers and assigning roles.

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Create a document template

Create teams to collaborate on documents and templates in real time.

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Add Signature fields

Get accurate signatures exactly where you need them using signature fields.

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Archive documents in bulk

Save time by archiving multiple documents at once.

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Connect airSlate SignNow to your apps

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Data accuracy, security, and compliance

airSlate SignNow is committed to protecting your sensitive information by complying with global industry-specific

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FAQs

Here is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.

Need help? Contact support

How does signature verification work?

Verifying a signature will tell you if the signed data has changed or not. When a digital signature is verified, the signature is decrypted using the public key to produce the original hash value. The data that was signed is hashed. If the two hash values match, then the signature has been verified.
Is airSlate SignNow legally binding?

airSlate SignNow documents are also legally binding and exceed the security and authentication requirement of ESIGN. Our eSignature solution is safe and dependable for any industry, and we promise that your documents will be kept safe and secure.
How does signature airSlate SignNow verify?

Log in to your account or register a new one. Upload a document and click Open in airSlate SignNow. Modify the document. Sign the PDF using the My Signature tool.
How is online signature verification done?

Signature verification technology requires primarily a digitizing tablet and a special pen connected to the universal serial bus port (USB port) of a computer. An individual can sign on the digitizing tablet using the special pen regardless of his signature size and position.
Does a document need to be countersigned?

Most legal documents need to be signed and countersigned, but the signatures only apply to what's in the contract at the time of the signing; amendments to a contract that are added later have to be signed and countersigned as well, or they may not hold up legally.

What active users are saying — certify countersignature required

Get access to airSlate SignNow’s reviews, our customers’ advice, and their stories. Hear from real users and what they say about features for generating and signing docs.

I've been using airSlate SignNow for years (since it...

5

Susan S

I've been using airSlate SignNow for years (since it was CudaSign). I started using airSlate SignNow for real estate as it was easier for my clients to use. I now use it in my business for employement and onboarding docs.

Read full review

Everything has been great, really easy to incorporate...

5

Liam R

Everything has been great, really easy to incorporate into my business. And the clients who have used your software so far have said it is very easy to complete the necessary signatures.

Read full review

I couldn't conduct my business without contracts and...

5

Dani P

I couldn't conduct my business without contracts and this makes the hassle of downloading, printing, scanning, and reuploading docs virtually seamless. I don't have to worry about whether or not my clients have printers or scanners and I don't have to pay the ridiculous drop box fees. Sign now is amazing!!

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Legal countersign

Countersigning means writing a second signature onto a document. For example, a contract or other official document signed by the representative of a company may be countersigned by his supervisor to verify the authority of the representative. Also, a money order or other financial instrument may be signed once upon receipt, then signed again by the same person when presented for payment, as an indication that the bearer is the same person who originally received the item, and not a thief who has stolen the item before it could be carried to the place where it was to be presented. An example of where a countersignature is needed is with UK passport applications. In some constitutional monarchies and parliamentary republics, an order by the head of state is not valid unless countersigned by the head of government or, in case of promulgation of a parliamentary resolution, a presiding officer of the legislature. References

How can I sign a virtual PDF file?

There’s no need to print documents, you can easily sign them online, with airSlate SignNow. Register an account and get rid of paperwork and switch to a quick and ecological – digital way of executing them. Upload a PDF file and click on My Signatures from the left-side menu. Create your legally-binding eSignature by typing, drawing, or adding a picture of your handwritten one. Save the signed samples, send them to your partners right from the account, and invite them to do it online too. The tool integrates with popular clouds and other essential business applications for a smooth and easy virtual document workflow.

How do you sign a PDF with your own signature right from your computer, without any printing?

With airSlate SignNow, a GDPR compliant service for eSignatures, executing PDFs right from your computer isn’t a problem. Create an account and sign your documents anytime from your computer or even mobile device. Once you’ve registered, upload a PDF, and navigate over to the left-hand toolbar. Click on My Signatures, hover your cursor over where you need the signature to appear, and press down to add your own legally-binding signature. Draw it, type, or insert a picture. Save your sample to the Dashboard, download it to your computer, export it directly to the cloud, or send it to your partners and clients right from your account.

How can I sign an emailed PDF doc online?

If you received an email with an invitation to eSign a PDF with airSlate SignNow, just accept the request, click on the signature field, and add your signature by typing or drawing it, or inserting an image. The authorized copy will automatically be sent back. If you received the document as an email attachment, click register your account in airSlate SignNow, and you’ll never need to print and scan papers to sign them again. Only a few clicks are required to insert a valid eSignature.

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