Money received, or paid on your behalf (e.g., bills), not reported elsewhere on this form. This includes money that you received from a parent or other person whose financial information is not reported on this form and that is not part of a legal child support agreement.
This is FAFSA question 45.j. in the Student's Untaxed Income section. As a non-custodial parent whose financial information is not reported on FAFSA, I would think that any funds you use to pay your child's expenses, whether those funds come from your checking account, from loans that were taken out in your name, or from any other source, must be reported on FAFSA (as long as it's not part of a legal child support agreement).