Then I'd consider the following questions following a review of those documents:
1. Does the Respondent claim that they're their signatures? If so, unlikely that anything will come out of it.
2. Do the signer state that they're the Respondent in both cases?
3. Is it possible the form can be signed on behalf of the Respondent? If so, probably no issue.
4. As an alternative, if the form requires some form of declaration from the Respondent then having it signed by someone else is likely not okay.