Short answer. Yes. When the person ordered to give support pendente lite fails to do so, any third person who furnished that support to the applicant may, after due notice and hearing in the same case, obtain a writ of execution to enforce his right of reimbursement against the person who was supposed to pay.
What the law says
any third person who furnished that support to the applicant may, after due notice and hearing in the same case, obtain a writ of execution to enforce his right of reimbursement against the person ordered to provide such support
Rule 61, Section 5 — Enforcement of order. Read the full provision →
The primary remedy runs against the non-complying parent
The rule's starting point directly addresses the person who actually failed to pay: if the adverse party fails to comply with an order granting support pendente lite, the court shall, motu proprio or upon motion, issue an order of execution against him. That execution is generally available whether or not you personally initiate it — the court can act on its own, and it comes without prejudice to the non-complying parent's separate liability for contempt of the original support order.
A separate, direct right belongs to whoever actually paid
The rule then addresses your exact situation. When the parent refuses or fails to give the ordered support, any third person who furnished that support to the applicant — you, in this case — may... obtain a writ of execution to enforce his right of reimbursement against that same non-complying parent. Your having actually stepped in to cover your grandchild's support is what genuinely triggers this right — the rule does not require any prior court approval before you extended that help.
Due notice and hearing come first
This particular right does not simply bypass procedure: it is exercised after due notice and hearing in the same case. You are not simply and automatically handed a writ upon merely claiming that you paid — the rule builds in a genuine notice-and-hearing step within that same existing case before the writ of execution for your reimbursement can actually be issued by the court.
Why this matters for someone in your position
This provision exists precisely because unpaid court-ordered support does not stop a child's needs from arising, and someone — often a relative like a grandparent — frequently steps in to cover the gap. The rule gives that person a direct, enforceable path back to the party who was actually obligated to pay in the first place, rather than leaving that entire cost to fall permanently on whoever generously stepped up to help a child in need.