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Recently I started to use Aspose library instead Pdf2PdfAPI for converting PADES (signed Pdf) to PdfA. Actually, I know, that it is no way to correct converting signatures to PdfA, so before it was used like Pdf …...Convert PDF to PDFA using C# and Aspose.PDF | Attachment is missing...missing in output Aspose.PDF Product Family pdf-to-pdfa mvesely May...