// load document
PDDocument doc = PDDocument.load(document);
// create signature dictionary
PDSignature signature = new PDSignature();
signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE); // default filter
// subfilter for basic and PAdES Part 2 signatures
signature.setSubFilter(PDSignature.SUBFILTER_ADBE_PKCS7_DETACHED);
signature.setName("signer name");
signature.setLocation("signer location");
signature.setReason("reason for signature");
// the signing date, needed for valid signature
signature.setSignDate(Calendar.getInstance());
// register signature dictionary and sign interface
if (signatureProperties != null && signatureProperties.isVisualSignEnabled()) {
options = new SignatureOptions();