AcrobatDigital Signatures and CM/ECF
Adobe Acrobat's handy and cool digital signature tool runs into trouble in CM/ECF. The Acrobat digital signature certifies that the docuent is authentic and unmodified since the time the signature is attached. But when CM/ECF attaches a header, the document is modified -- causing the signature to display an error code.

The solution? Don't use Acrobat digital signatures in CM/ECF filed documents.