If you are using a PenPad to sign PDF documents in Acrobat or Reader you will receive the following dialog after successfully signing the document:
You may wish to disable this dialog permamently to avoid it displaying to the end-users.
You can allow the dialog to appear once, and the users can then select the checkbox “Do not show this message again“. Alternatively you can add a registry key which will disable this dialog permanently:
HKCU\Software\Adobe\Adobe Acrobat\10.0\AVAlert\cCheckbox\cppklite\isignDone REG_DWORD, 1