When the parent has multiple students attending the same institution and needs to e-sign documents for the students, the parent is required to create separate accounts for each student for whom they need to provide an e-signature for on a document.  This is due to when the parent creates an account they confirm their information on the ISIR along with the student's information for whom they need to e-sign documents.  

This is also a requirement to ensure that student information is not co-mingled between separate student accounts, similar to how in the financial aid office you would have separate files for each student.