The platform I'm working with is Adobe Acrobat Pro 11.
The forms that my place of employment uses require signatures from the client and our representative. We are using an Ipad on the field to present forms and obtain signatures from clients. The forms once singed are emailed to ourselves so that we can store them in our server. The problem we have encountered is that once the documents is signed and we try to open it on our PCs (windows) we get the infamous message- "At least one signature is invalid..." Our agency does not need the signature to be certified or validated, all we require is that the signature be carried over digitally with the form so we can keep in our records. Is there a way around this problem? I have searched on the forum for an answer but I haven't found one yet.
The warning is a security feature so you cannot just turn it off.
Adding the digital ID(s) that created the self-signed identities to your trust list will stop the message appearing for that specific ID, but you cannot choose to globally trust all self-signed IDs.
I forgot to mention that on the ipad we are using PDF Expert to open, fill and sign all of our forms. It is unfortunate that that feature cannot be turned off. Now, how would i go about validating a signature? I don't understand what it is that i need to do.
When a document is Reader-enabled, it is digitally signed by Acrobat and this signature is used to validate the usage rights. PDF Expert doesn't save the document in a way that would retain the usage rights, and since the form doesn't need to be Reader-enabled in order to be used with PDF Expert, you should not enable it and this problem should go away.
I tried with a new simple form that is not reader-enabled with the hopes that it would fix the problem but I still get the same message. Is there maybe a different app that anyone could recommend using when filling out pdf forms?
I'd be very interested in looking at a sample document - one that was not Reader-enabled and e-signed with PDF Expert - that shows this behavior. If you're free to email me a sample I'd be happy to take a look: acroscript at gmail dot com
Thanks for the file. The problem is you're using digital signature fields with PDF Expert, but Acrobat/Reader don't have a way to validate such signatures (because they can't be). I assumed that you would not use signature fields and instead simply use the signature tool in PDF Expert to e-sign. These two different methods result in the same type of things, namely an appearance of a hand drawn signature, but neither are digital signatures. In the case of the digital signature field, it merely sets the field appearance. So I would suggest removing the signature fields and use the signature tool in PDF Expert instead.
If you do as I suggested and use the signature tool instead of digital signature fields, it might be a good idea to flatten the resulting pencil annotations, either when sending the document or after you receive the document. A handy tool you can use for this is the free JavaScript-based utility Dave provides here: http://www.uvsar.com/projects/acrobat/flattener/
You can selectively flatten just the pencil marks (aka Freeform lines) and perhaps the fields.
Thank you for all of your help with this problem. I ended up deleting all signature fields on my forms and using the signature feature on PDFExpert. This is working out great for our purposes.
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