2 ms·

Yes! I'll be adding a way to apply images to PDFs soon. Do you usually have an image of your signature handy on your computer or would you create one if the ima

Yes! I'll be adding a way to apply images to PDFs soon. Do you usually have an image of your signature handy on your computer or would you create one if the image feature was available? Another thought I had was maybe adding a "signature pad" where users can scribble their signature and I'd save it for them to use repeatedly. I'd love your thoughts on this.

nemo1618 9y ago
I have an photo of a handwritten signature that I use in Adobe. They do a pretty good job of extracting the signature contours from the photo. I've also seen a (much crappier) version of this on my mobile banking app, for processing photos of checks. They basically just blow up the contrast until only the blackest part of the image remains. It looks awful, but it might be a good place to iterate from. If you implement something more sophisticated, it definitely makes sense to save it on the backend so you don't have to redo the (possibly expensive/slow) image processing operation every time. A signature pad could work too; I think HelloSign has something like that. But it's not a great solution if you don't have a tablet, since it's really hard to draw a proper signature with a mouse. Honestly, even just adding a "handwriting font" might be good enough for most circumstances. Most of the document signing services provide this, and it could be implemented very quickly with minimal changes to your API. If I were you, I would probably start with a handwriting font, and add hand-drawn signature support afterward. I would also look into what the law says about this sort of thing. I know that services like HelloSign require that you authorize them to use your signature in a legally-binding manner. But I don't know if that regulation would apply to your service, since your service is a lot more bare-bones. For example, you don't store the PDFs indefinitely, and you don't coordinate any sort of multi-party signature operation; that all happens out-of-band. So you might be in the clear.
- mariusz331 9y ago
  Thanks for all this great info. We do have a font option called 'Dancing Script' available now which can make your text look like a signature. I'll do some more research on e-signatures, though. I assume there's more to it than just changing your text's font.
  - kanzure 9y ago
    well, you should consider doing actual cryptographic signatures over the document, plus timestamping like via https://opentimestamps.org/ https://opentimestamps.org/

nemo1618 9y ago

I have an photo of a handwritten signature that I use in Adobe. They do a pretty good job of extracting the signature contours from the photo. I've also seen a (much crappier) version of this on my mobile banking app, for processing photos of checks. They basically just blow up the contrast until only the blackest part of the image remains. It looks awful, but it might be a good place to iterate from. If you implement something more sophisticated, it definitely makes sense to save it on the backend so you don't have to redo the (possibly expensive/slow) image processing operation every time. A signature pad could work too; I think HelloSign has something like that. But it's not a great solution if you don't have a tablet, since it's really hard to draw a proper signature with a mouse. Honestly, even just adding a "handwriting font" might be good enough for most circumstances. Most of the document signing services provide this, and it could be implemented very quickly with minimal changes to your API. If I were you, I would probably start with a handwriting font, and add hand-drawn signature support afterward. I would also look into what the law says about this sort of thing. I know that services like HelloSign require that you authorize them to use your signature in a legally-binding manner. But I don't know if that regulation would apply to your service, since your service is a lot more bare-bones. For example, you don't store the PDFs indefinitely, and you don't coordinate any sort of multi-party signature operation; that all happens out-of-band. So you might be in the clear.

mariusz331 9y ago
Thanks for all this great info. We do have a font option called 'Dancing Script' available now which can make your text look like a signature. I'll do some more research on e-signatures, though. I assume there's more to it than just changing your text's font.
- kanzure 9y ago
  well, you should consider doing actual cryptographic signatures over the document, plus timestamping like via https://opentimestamps.org/ https://opentimestamps.org/