How to disable digital signature removal in PDFs

Set allowDeletingDigitalSignatures to false to disable removing of added Digital Signatures. Get additional resources by visiting our PSPDFSignedFormElementViewController API guide.

//
//  Copyright © 2019-2025 PSPDFKit GmbH. All rights reserved.
//
//  The Nutrient sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//


import PSPDFKit
import PSPDFKitUI


class DisableRemovingDigitalSignatureExample: Example {


    override init() {
        super.init()
        title = "Disable removing Digital Signature"
        category = .forms
        priority = 15
    }


    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController? {
        let document = AssetLoader.writableDocument(for: "Signed Form.pdf", overrideIfExists: false)
        return PDFViewController(document: document) {
            // Set `allowDeletingDigitalSignatures` to false to disable removing of added Digital Signatures.
            $0.allowRemovingDigitalSignatures = false
        }
    }


}

This code sample is an example that illustrates how to use our SDK. Please adapt it to your specific use case.