PDFSignatureType

A string value that represents the type of signature used to sign a PDF document. The PDFSignatureType data type is a member of PDFSignatureField and Signature Type data types.

These string values are valid:

AUTHORSIG:
The signature field is an author signature field.

RECIPIENTSIG:
The signature field is another type of signature field.

XMLSIG:
The signature field is an XML signature field.

NOSIG:
No signature field exists on the PDF document.