Signature and upload file in fillable PDF

Can I still have digital signature and upload file for fillable form?

Unfortunately signature and upload files and not available inside of fillable PDF. In case that file upload is added to your form it will be hidden at this time on the PDF files since you can’t transfer file attachments to our servers via a PDF.

And considering widgets like signature, it require extra scripting and are loaded from external resources so at this time they are not available.

For more info about restrictions in fillable PDF you can find inside of this article:

http://www.jotform.com/help/312-Fillable-PDF-Everything-you-need-to-know-about-JotForm-fillable-PDF-creator 

Hope this will help. Let us know if you need further assistance.