MyPDF is pdfDocument = PDFOpen("test.pdf")
nNbSignatures is int = PDFNbSignatures(MyPDF)
FOR i = 1 _TO_ nNbSignatures
bufSignature is Buffer = PDFGetSignature(MyPDF, i)
dtSignatureDate is DateTime = PDFGetSignatureDate(MyPDF, i)
Certif is Certificate = CertificateExtract(bufSignature)
END