Start Validating internet information

Validating internet information

You can also use When you certify a PDF, you indicate that you approve of its contents.

For example, suppose that a government agency creates a form with signature fields.

When the form is complete, the agency certifies the document, allowing users to change only form fields and sign the document. However, if they remove pages or add comments, the document doesn’t retain its certified status.

The act of checking a document against these constraints is called validation, and this is what the Markup Validator does.