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Issue with sign xfa-Form-PDF File when flatten, convert or redering, signature disappears

Hi team,
I use Aspose.pdf for Net, Vers. 21.6.
I’m trying to flatten, convert or render a PDF file, that contains a signature with a signatur image. The PDF file is an xfa-Form-PDF.
After flatten, convert or render the signature image always disappears.
Unbenannt.pdf (225.5 KB)

The source code:
for flatten:
pdfDocument = new Aspose.Pdf.Document(“abc.pdf”);

for Convert:
Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(“abc”);
pdfDocument.Convert(new MemoryStream(), PdfFormat.PDF_A_1A, ConvertErrorAction.Delete);

for rendering:
PdfConverter converter = new PdfConverter();
while (converter.HasNextImage())
converter.GetNextImage(“abc.pdf” +
System.DateTime.Now.Ticks.ToString() + “_out.jpg”, System.Drawing.Imaging.ImageFormat.Jpeg);

As attachment , see the original PDF File (use this file only for your internal tests , and delete it thereafter).
Do you have any idea, why the signature image disappears.
Thank you


We were able to reproduce the issue in our environment while testing the scenario with 21.7 version of the API. Therefore, we have logged it as PDFNET-50269 in our issue tracking system for the sake of correction. We will look into its details and keep you posted with the status of its rectification. Please be patient and spare us some time.

We are sorry for the inconvenience.

In this context we received further pdf files from the customer. With these, too, the signature disappears after the conversion.
When can we expect a solution. Our customer expects a solution soonNEGATIV3.pdf (846.0 KB)
NEGATIV1.pdf (157.6 KB)


We have logged two new ticket for your new files:

  • PDFNET-50315 (NEGATIV3.pdf)

We will check them as well and let you know once these tickets are resolved.

Furthermore, please note that the tickets are resolved on first come first serve basis in free support model. The resolution time of the issue depends upon the number of issues logged prior to it. We have recorded your concerns and will certainly consider them during investigation. We will let you know once we make some definite progress towards resolution of the logged tickets. Please give us some time.

We apologize for the inconvenience.

hi Team,
Any news on this issue?


We are afraid that the earlier logged tickets have not been yet resolved. However, we have recorded your concerns and will surely inform you once we have some definite updates about their resolution. Please be patient and spare us some time.

We are sorry for the inconvenience.