A PLUS loan taken out by a parent could still be discharged in the case of a false certification.
by the way for the Public Service Loan Forgiveness (PSLF) how can I submit the form?
Submit the completed form, with your employer's certification, to FedLoan Servicing, the federal loan servicer for the United States Department of Education for the PSLF Program. You can mail the form to this address:
FedLoan Servicing Already Your Administrator?