You can decide to CHANGE the Successor to someone else without a fee at any time.
If a beneficiary or their parent is not totally financially trustworthy, consider your Trust as a successor entity (the funds remain outside of your estate gifting limits.) Your trustee will help decide when the money is disbursed.
Isaac contributes to his granddaughter’s fund because his son (her father) is an irresponsible drunk most of the time. Isaac is concerned the son could abuse her 529 funds, so he designates his trust as the successor owner in this case. The responsible trustee will care for the granddaughter’s education expense needs.
No statement or example on this site should be considered a specific recommendation for your personal situation. Investing and tax strategies each carry significant risks. Examples herein may not apply to your situation. Please consult your estate attorney, tax advisor, or financial advisor for personal advice.