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# PDFDigitalSignatureAllowedChanges

Namespace: O2S.Components.PDF4NET.DigitalSignatures

Specifies the allowed changes to a document after applying a digital signature.

    public enum PDFDigitalSignatureAllowedChanges

Inheritance Object → ValueType → Enum → PDFDigitalSignatureAllowedChanges
Implements

## Fields

Name | Value | Description
--- | --- | ---
NoChangesAllowed | 1 | No changes to the document shall be permitted; any change to the document shall invalidate the signature.
AllowFormFilling | 2 | Permitted changes shall be filling in forms, instantiating page templates, and signing; other changes shall invalidate the signature.
AllowFormFillingAndAnnotations | 3 | Permitted changes shall be the same as for PDFDigitalSignatureAllowedChanges.AllowFormFilling, as well as annotation creation, deletion, and modification; other changes shall invalidate the signature.