PDF form flattening is a critical step before distributing any completed form. Whether you have filled a tax form, completed a job application, or signed a contract, flattening prevents recipients from altering your entries while perfectly preserving the visual appearance of your work.
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Frequently Asked Questions
What does flattening a PDF form do?
Flattening converts all interactive AcroForm fields (text boxes, checkboxes, radio buttons, signatures, dropdown menus) into static page content that looks identical but can no longer be changed. The visual appearance of filled-in values is preserved exactly. After flattening, the PDF no longer contains editable form fields.
Why should I flatten a PDF before sending it?
A filled PDF form with active fields can still be modified by the recipient. Flattening prevents any changes to the form data after you have reviewed and finalized it. This is critical for signed contracts, completed applications, tax forms, and any document where the filled values must be immutable.
Will flattening remove my digital signature?
Standard PDF form flattening preserves the visual appearance of a drawn or typed signature that was added as a form field, converting it into static content. However, cryptographic digital signatures (PKI-based, like DocuSign or Adobe Sign) are separate from form fields and are not affected by form flattening.
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