![]() ![]() Thus, you should add revocation information and digitally time stamp the whole construct during the life time of the certificate to guarantee long term validation. Click Send to send your document for e-signing. Mark where signers need to fill in and sign. Add recipients’ email addresses, then click Next. Select the document you want to send for e-signing. The key is PdfName.M.Īs an aside, as your signing certificate is only valid for half an hour, validators may also reject it if their validation policy only trusts digital time stamps, not unsecured date-time values. Click the Select a file button above, or drag and drop a file into the drop zone. But if you use a custom ExternalSignatureContainer implementation in your signing code (and not an ExternalSignature implementation), you can remove that entry in your modifySigningDictionary implementation. Unfortunately using the PdfSignatureAppearance method setSignDate to set a null value does not work, later on in the signing process this results in NullPointerException occurrence. This additionally makes your signed PDF follow the recommendation above and so be more precise. Thus, another way to resolve the issue is to make sure no signing time value is added to the signature value dictionary at all. But as the values differ, this can result in different verification results by different validators, using either one or the other value. In your case, though, the embedded signature container does contain a signingTime signed attribute with value 09:29:44 GMT which is not before the start of certificate validity.Īs that only is a recommendation, your PDF signature is not made invalid by having two signing time values. Your signature actually also violates a recommendation from the specification: The afore mentioned signing time stored in the signature field value dictionary should be used only when the time of signing is not available in the signature (the embedded signature container). You can do that by means of the PdfSignatureAppearance method setSignDate. Thus, one way to resolve the issue is to tell iText to use a time slightly (e.g. Unfortunately that is after the time iText stored as signing time in the PDF at the beginning of the signing process. At the claimed signing time, therefore, your signer certificate was not valid yet and could not create a valid signature.Īpparently you sign using a signing service that creates a short-time certificate just in time when your signature request to it arrives. In the PDF signature field value there is a signing time 1 09:28:35 GMT but your signer certificate is valid not before 1 09:29:44 GMT and not after 1 09:59:44 GMT. That is not surprising: Your signature is not valid. Selecting a region changes the language and/or content on have tried many ways to validate the signature but couldn't get any success. If you have checked all these conditions and still can't fill out and submit the form, post your question on the Acrobat forum.For more information, see the forum post Operation not permitted. ![]() To locate and remove content you don't want, choose Document > Examine Document in Acrobat. To embed fonts, choose Tools > Advanced Editing > TouchUp Text Tool. To check for unembedded fonts, choose File > Properties > Font tab. Also, make sure that fonts are embedded in any PDF before you import it as artwork in the form. If the message "This operation is not permitted" appears when users open or submit your form, check for unembedded fonts or hidden objects.You can click Yes to run the Form Field Recognition tool, or use the Typewriter tool to create form fields. Do you want Acrobat to detect the form fields for you?". Check if this message appears: "Currently there are no form fields on this PDF. If the form doesn't have interactive form fields, open the form in Acrobat 9 (any version) and choose Forms > Add Or Edit Fields. ![]()
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