Do any of your products append PDF documents to multiple documents?

First, append a blank page to the end of every PDF file:

1. Select "Pages->Batch process" to enter into batch interface;
2. Add PDF Documents: click "Add directories to list";
3. Choose "Add Action->" to set for new blank pages: Insert->1 page, Position->After, Where to insert?->Last Page, then click "Ok" to save settings;
4. Click "Process" to insert a blank page to the end of those PDF documents instantly.

Then, stamp on the last blank page with the same one-page file:

1. Add PDF Documents: choose "File->Add PDF Document" or "File->Add Directory", you can even drag the files to the list directly;
2. Click "Watermark->Create->New PDF Watermark", then add your PDF, set page range->Page No. as "-1", then save as a new watermark;
3. Append Watermark to PDFs: click "Watermark And Save As" to add defined PDF watermark to your original PDF files.

Then you will get all your files appended with the single page PDF file.