I am considering upgrading to DC in order to not only have the features of making forms fillable, etc. but also so that my clients can digitally sign documents. However, after I have the client sign the document I often need to add details (not things the client would complete or sign off on) plus my own signature before submitting to the insurance carrier. Other products designed for the insurance industry allow this - can I do that in DC without any problems with the signatures being valid?
You need to certify your PDF with permissions to add additional info after signing before you send this PDF to your clients. It also means that your client will be able to do the same.