Does AppendPDF Pro support PDF Forms?

AppendPDF Pro cannot append PDF files that contain active form fields, however you can append form documents where the form fields have been flattened.  You would first need to use the form-flattening feature in another product, FDFMerge. Form flattening is a process whereby form data is stamped directly into the document, and the form fields are effectively removed. You can then successfully append your files with AppendPDF Pro.