You can merge several signed and/or unsigned documents into a single PDF (or PDF/A) document, which can then be authenticated with your digital signature. When merging signed documents, remember that the digital signatures originally present on the documents are deleted; only the Signature appearances remain in the merged document. It is necessary to authenticate the newly merged document. In other words, all signers of the original document must digitally sign the newly merged document to authenticate it.
Note that it is possible to merge only one document to remove its digital signature while keeping the Signature appearance intact. It is also possible to merge documents without signing the result by cancelling the last signature step. ConsignO will then invite you to save the unsigned document.
You will be warned about signature zone conflicts if there are any.
You now have a new merged document ready to be signed.