Set Validation for Form Fields and eSignatures
How to add field validators with airSlate SignNow
Since different kinds of data can be presented in different ways, it is important to make sure the recipients of your documents understand how exactly they are expected to fill out specific fields. Field validators will help them enter data correctly, and thus, eliminate errors in the forms they submit.
Add fillable fields
Before applying validators, insert fillable fields in your document. Please note that validators are only available for Text fields and Date/Time fields.

Choose and apply validators
Different types of fields have different validators. Let’s start with the date field. Click on it and open the Validation Type dropdown in the sidebar on the right. Then, select the validator you want to apply to the field.
For Date/Time fields, you can set the American or European date format or choose several other options.

For Text fields, the variety of validators is even greater. You can request a recipient to provide their phone number, email address, state, zip code, and other types of information.
Note that the validators marked with a calculator icon allow you to request specific numerical values such as numbers or US currency. These numerical validators are also used for formulas applied to calculated fields.

The validators you’ve chosen will ensure that the data is entered correctly in the fields during the completion process.

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Go beyond eSignature with set validation for form fields functionality
When preparing a form, you can place fields (fillable areas) to let signers insert their data. airSlate SignNow provides an assortment of useful fillable fields for creating professional documents: Text, Date/Time, Signature, Initials, Checkbox, Dropdown and Calculated, Attachment Request, etc. Not only can you make it convenient to build dynamic signable PDFs, but you can also add a unique set validation for form fields feature to those fields to get complex data, making it easier to fill out your forms. This tool helps keep you accurate and efficient, and secure.
How to use airSlate SignNow’s advanced feature - set validation for form fields:
- Log in to your airSlate SignNow account or sign up for a free trial.
- Add a document or template and open it in the editor.
- Start adding recipients by clicking the Edit Signers button and assign roles.
- Click the field options (Signature, Text, Date, etc.) listed in the left Tools menu.
- Drag and drop the needed tool where you want it on the page(s).
- Set up Advanced Options.
- Set them as required, payment, or conditional (fields are visible if conditions are met).
- Assign the field to the respective role if you have several signers per one document.
- Check if you added a label in the Label box.
- Use Validation Type -> add Prefilled Text.
- Click Done when finished.
Get access to airSlate SignNow’s set validation for form fields option to improve your document workflow and deliver a fantastic experience for signers. Our advanced tools help users like you build online fillable forms, send documents for approval, make them faster for recipients to complete, and securely store records. Try it out anywhere, anytime!
How it works
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FAQs credit card validator
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How do I create a fillable PDF from Excel?
Learn how to convert airSlate SignNow, Word, Excel, and other files into fillable PDF forms. Download the project files to follow along with the sample file, or use your own form. Open Acrobat and choose Tools. Find Prepare Form and click Open to browse to the file you'd like to convert to an interactive PDF form. -
How do I create an interactive PDF in Acrobat?
Open airSlate SignNow. Click "File" in the top menu bar and then select "Open." ... Click "Tools" in the top menu bar and select the "Forms" sub-menu. ... Click once on your PDF file, hold, and then drag to draw your interactive field. -
How do I make a field required?
Add fillable fields to your document in the editor. Then, click on any field that you want to make required and check the Required box at the top of the right-hand sidebar. Repeat the same process for each field that needs to be made required. -
What is pre-filled text?
With airSlate SignNow, you can prefill documents with information you already know. For example, if you know your signer’s name, you can add it as pre-filled text to the corresponding field in a document. As a result, your signer won’t have to complete this field but will be able to edit the information inside if needed. You can customize pre-filled text for text fields, date/time fields, checkbox fields, radio button groups, and dropdown fields.
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Frequently asked questions
How do you generate a document and apply an electronic signature to it?
How do I add an electronic signature to a Word document?
How do you add an eSignature to a PDF?
The ins and outs of eSignature



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