Hi Sambat33,
Thank you for posting your question in the forum today.
Because the advance payment is based on the tax filer last claiming the child, of which they would only be receiving 1/2 of the amount the tax filer will be allowed to claim at year end, any amount they are not entitled to will be required to be repaid to the IRS.
Read further under "Who may need to be careful before spending":
https://www.cnbc.com/2021/06/21/repaying-2021-child-tax-credit-what-to-know.html
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"