If you want the full version and license for commercial use,
you can purchase here :

https://fontkong.com/product/double-signature/

File Font Version : 

1. Double Signature.otf
2. Double Signature.ttf
3. Double Signature.woff
4. Double Signature Italic.otf
5. Double Signature Italic.ttf
6. Double Signature Italic.woff