Guides

Remove Digital Signatures

You can easily remove a digital signature, and when you do so, both the appearance and data associated with the signature will be deleted.

It's important to note that removing a signature does not remove the signature field.

This example shows how to remove digital signatures：

java

// Remove digital signature.
CPDFDocument document = new CPDFDocument();
document.open(FileUtils.getAssetsTempFile("Signed.pdf"));
for (int i = 0; i < document.getSignatureCount(); i++) {
    CPDFSignature signature = document.getPdfSignature(i);
    if (i == 0){
        // Remove first digital signature.
        boolean result = document.removeSignature(signature, document, true);
        if (result) {
            System.out.println("remove signature success");
        }else {
            System.out.println("remove signature fail");
        }
    }
}
document.save(rootDir + "/out/signatureTest.pdf", CPDFDocument.PDFDocumentSaveType.PDFDocumentSaveNoIncremental);

Remove Digital Signatures ​

Remove Digital Signatures