Does the respondent still have the window with the retrieved form? If the retrieved form is still on the browser window, he can save the form again. Right after that, he will see a message at the bottom right corner of the form saying "Progress saved successfully. Re-send email with link". By clicking Re-send email with link, he will be able to have the link email sent again.
If he doesn't have the retrieved form on a browser window, unfortunately, there is no way for us to identify which data belongs to him, since all form data are saved anonymously. The data link contains a randomly generated key and it serves as a receipt for the respondent's data. Without the link, we have no way to locate the data.
Senior Computer Scientist
Adobe Systems Incorporated
If the respondent doesn't have the retrieved form on a browser window, there is still a small chance to locate his data if he has the following information:
1. Around what time he saved his form
2. The email address he specified to have the data link sent to
3. Any field value he saved that can identify his data
Please let me know if he does have those information.
I have this exact same problem. Should I email you the information directly?