Order Printer Pro: PDF Invoice

How can I incorporate digital signature on Invoice. As per rule Invoice to be prepared at our office and to be signed by official (Manually or Digitally)
If not done then it is violation of GST rules.

This app has brought my order receipts to the next level. The customer service is amazing, very quick to address any of my special requests. I now have the all the information needed to pack customer orders quickly. Thank you very much! Lisa

Great app for generating customers invoice! Also great customer support that quickly helped me to fix an issue I had.

Great App, great Support!
It does everything what we need to do. Invoices for non-eu countrys and packing slips and much more.

I communicated with customer service back and forth to edit and help customize my invoice. They responded every time within minutes and we created exactly what I envisioned. It was perfect. Outstanding app and service.

Great App and Great customer service! I needed some slight modification to the invoice and customer service got back to me super quick!

I wanted to create invoice-pdfs that look exactly like my layout of my existing (and designed) stationary. It did what it should, but I was hoping that the integration into the Shopify world would be direct and not the route with copy&pasting code into line xxx in Shopify's 800+ line coding. I used a template that I bought and tried the customization, but my chosen invoice theme (Paris) did not really offer much customization. I ended up using it, and then coding it with my rookie html/css skills.

This app lets me customize printouts for draft orders! This problem has nagged me since we started with shopify, as we needed to send quotes to customers, prepare packing checklists for internal use, ect.

Great app that completely takes away the hassle of setting up external invoicing. On top the have great support! :)

Great app that allows automated invoices to be sent with draft invoices. Support team very helpful and efficient, even creating unique code for something I needed specifically - highly recommend!