Will in the Sign Live! CC SPARKASSEN edition If the validation report is generated with "extended options", the report can be attached to the original document. This causes the signatures to be marked with a red X. The message "The document has been changed since it was signed and is no longer valid" appears with the signatures.
According to the current PDF specification, the signature must be "broken" if the document is changed (page was attached). This behavior is correct according to the PDF specification.
Solution: Do not attach the validation report to the original document, but save it as a separate file. The report is given the name by default .valreport.pdf.