Issue with Data Loss in Collected Signatures

Hi KoBoToolbox Support Team,

I’m experiencing an issue with collected signatures in my form, where the Question Type is set to Photo and the Appearance is Signature.

This question has been functioning correctly for a while, but I recently noticed a problem. Specifically:

  • When viewing the record, I see a message stating: “Could not find signature.”
  • When attempting to open the record in Edit mode, a warning appears: “File could not be loaded (leave unchanged if already submitted and you want to preserve it).”

This issue is preventing me from viewing or exporting the collected signatures.

Could you please assist me in identifying the cause and resolving this issue?

Thank you for your support!

@Ahmad, could you provide me the following through a private message? Maybe I could have a closer look at your case.

  • Username
  • Project name
  • Server

You should be able to send me a private message as outlined in the post discussed previously:

Thank you @Kal_Lam . I have shared the details in private message

Hi team,

I am experiencing the same issue as well. In the submitted forms most responses have a successful signature that can be seen and downloaded, however it seems that it sometimes might not and show:
Could not find signature.
Any way we can address this?

Kind regards,
Jonathan

Dear Kal,
I imagine you might request the same information as the previous submission. So here is the requested info:
username: projectdatacollect
Project name: Consent Form
server: eu.kobotoolbox.org

hope that is helpful.
best,
Jonathan

Same here. This has been happening for more than a year for me. but now it has gotten worse.

When the form is submitted, all data is filled properly and the signatures are there. When you go to view the signature, it’s not there. Please this is urgent, we use these forms to distribute cash and collect signatures as proof.

Greetings, I do not have direct experience of this issue, however from looking at past forum posts relating to signatures I see there are two aspects that may be relevant for the Kobo team to help troubleshoot:
a) what tool is used for data collection (Enketo web forms or Kobo Collect app)
b) whether the data is collected in offline mode or online mode

I can see an issue was previously fixed regarding signature/offline Enketo that may relate: Could not retrieve signature - #6 by steen_andersen

For those having this issue, how is your data being collected/submitted?

Hi @nat Im using webforms (Enketo). I will try to test it with some delay.

Thank you Nat for your input.
Indeed there seems to be same issues previously listed, however I havent read of a clear response to this issue. For my part, we collect on Enketo web forms and do so online only which is why this has been a little odd.
We are testing to see if allowing a few seconds from data input to submission will change anything in the grand scheme of things, however since this is related to consent form collection even the small number of ones that might get away are important.

In our case, we are using Enketo web forms. The project utilized an online-only link, for one-time use per respondent.

Moving forward, I will consider adding a question after the signature field in future forms. This adjustment is based on the recommendation that signatures may be lost if the time between adding the signature and clicking the submit button is too short. However, in the example shared by Isslam, the form collected the signature twice, yet the signature was still lost. This suggests that the issue may not be entirely related to timing.

Another potential factor worth investigating is whether this issue could be linked to the server being used.