Add multiple signers to sign and fill a document with C# SDK using the API

Get documents signed and filled from multiple recipients even when you only have their email addresses using the airSlate SignNow API. Add as many signers as you need and organize them according to your required signing hierarchy.

  • Free to test
  • Fast to deploy
  • Powerful & secure

Make the process of signing smooth and simple by establishing a signing order

Get all signatures you need in one go, save time by getting your documents signed faster than ever before.

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  • We provide developers with complete SDKs for all popular languages, allowing them to integrate eSignature workflows without writing a single line of code.
  • With our detailed documentation, integrating the airSlate SignNow API is a breeze.
  • The airSlate SignNow API not only provides you with eSignatures: use it to create fillable forms, request payments, and download & archive documents using simple API calls.

airSlate SignNow regularly wins awards for ease of use and setup

Read our reviews on the trusted resources

Tech Data uses airSlate SignNow to improve our internal and external customer service while increasing our speed to revenue.
Bob Dutkowsky CEO
Bob Dutkowsky | CEO

Select an API package for your business

Integrate eSignatures into your software and get 250 legally-binding signature invites with your API free trial.

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Solution engineers

We are here to help you configure eSignature API to your workflow.

Review airSlate SignNow’s API documentation

The detailed API tutorial will guide you through the entire integration process and provide clear coding examples.

Video guides

Watch our video guides for instructions on how to easily build custom integrations.

Start with any of our SDKs

Get complete SDKs for Node.js, Python,
PHP, Java, C#.

Enterprise-grade security and compliance

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

GDPR compliance
GDPR compliance
Regulates the use and holding of personal data belonging to EU residents.
SOC 2 Type II Certified
SOC 2 Type II Certified
Guarantees the security of your data & the privacy of your clients.
PCI DSS certification
PCI DSS certification
Safeguards credit/debit card data for every monetary transaction a customer makes.
21 CFR Part 11
21 CFR Part 11
FDA-backed standards for electronic documentation and electronic signatures.
HIPAA compliance
HIPAA compliance
Protects the private health information of your patients.
CCPA compliance
CCPA compliance
Enhances the protection of personal data and the privacy of California residents.

Watch the airSlate SignNow API in action

Get started with uninterrupted eSignature API: add multiple signers to sign and fill a document with C# SDK using the API

Consolidate and streamline your eSignature workflows and establish seamless processes. Try the airSlate SignNow API, implement eSignature workflows into your custom apps and websites in minutes, and seamlessly add multiple signers to sign and fill a document with C# SDK using the API.

Add multiple signers to sign and fill a document with C# SDK using the API the airSlate SignNow API for uninterrupted eSignature API

  1. Click API on the airSlate SignNow main page and create your API Sandbox account.
  2. Open your email to confirm the registration and specify a password for accessing your Developer Sandbox environment.
  3. Find the list of your apps at the top of the page. By default, you can also find a Test App for testing the API.
  4. Click its name to access the Client ID and Basic Authorization Token.
  5. Launch the API using the information from the previous step.
  6. Use the code samples from the airSlate SignNow library.
  7. When you're ready to go live, go to your airSlate SignNow account and choose a subscription plan.
  8. If you can't find a subscription that suits your needs, contact the Sales team.
  9. Change the test URL in your requests to the production environment URL.
  10. Delight your customers and partners with a streamlined eSignature experience.

The airSlate SignNow API is straightforward to embed, test, and operate (no sales people involved). Get the opportunity to add multiple signers to sign and fill a document with C# SDK using the API easily. Select airSlate SignNow to get more streamlined eSignature workflows.

How it works

Create an account and access the API Dashboard
Copy required code from the library to add multiple signers to sign and fill a document with C# SDK using the API
Track how your productivity grows with accelerated workflows

Watch our instructions to build custom integrations with ease

airSlate SignNow offers a free testing environment to explore the eSignature.

Trusted eSignature solution — what our customers are saying

Explore how the airSlate SignNow eSignature platform helps businesses succeed. Hear from real users and what they like most about electronic signing.

airSlate SignNow is a Good Product That Increases Conversion Rates
5
Andy Taylor

We use airSlate SignNow to have new clients sign their professional services agreement with our firm. All of the attorneys in our firm use airSlate SignNow. We also occasionally use airSlate SignNow to have clients sign other documents, such as settlement agreements or authorizations to allow us to obtain their employment records and that sort of thing.

airSlate SignNow provides a detailed audit of who signed the document and when and where they signed it. airSlate SignNow allows users to customize the email that goes to the signers.

I have only had to use airSlate SignNow's support once, and that was just for a general question (I wasn't having a problem with the product). The response was very timely and very helpful. Other than that, I have not had to contact airSlate SignNow's support department because I'm always able to get my questions answered using their online support.

We use airSlate SignNow so that when clients sign up with us, there's very little delay between when we speak to the client and when they are able to sign the contract. It has increased our conversion rate because we no longer have to have clients print a contract, scan it in, and email it back to us.

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airSlate SignNow - The quickest (and cheapest!) way to get things signed
5
Chris Ammann

airSlate SignNow is used to efficiently and quickly have candidates sign offer letters, or for signatures required from employees for HR documents. It solves the problem of having a candidate print, then sign, then scan their offer letters back to us. So the ease of use for our candidates makes it a worthwhile investment for us.

It's one of the cheapest services out there for digital signatures. It offers a comprehensive audit trail of when items were signed, and by whom. It's quick, and very easy to use Very nice GUI.

I've only had to contact support once or twice, but both times my issues were resolved quickly.

We use airSlate SignNow for our candidate offer letters, where it helps us to quickly gain a signature from a candidate in a market that is so competitive that at times, the quickest company to get an offer sign will often be the company that makes the hire. It also shows a level of professionalism in presenting your offers.

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Easy to use and Intuitive
5
Ryan Spaulding

I used airSlate SignNow to sign leases. The software is excellent and intuitive. Up to this point, I have used 3 different eSign software services. airSlate SignNow was the best in my opinion. Other software might offer a few more features, however, airSlate SignNow was the easiest to use and navigate. I literally needed it to collect some signatures and initials. I didn't need the fancy stuff.

Ease of use -- Whether on a computer or using the app, it was easy for me as the sender and easy for the recipient. Intuitive interface -- Most of the time, the recipient of the documents was using airSlate SignNow for the first time. I never encountered a situation where they could not figure out how to use the software.

I would recommend airSlate SignNow to anyone who wants a solid eSign software.

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FAQs

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It’s time to watch the airSlate SignNow API in action. Create your developer account and upload documents, request signatures, and check the status of your document.

Why choose the airSlate SignNow API?:

  • Free to test and easy to deploy
  • SDKs for popular languages
  • Customizable for any workflow
  • Industry-leading security & compliance