I read on some blog that if a person owes back child support they will not get the stimulus check. Is this true?

[bebroca]

If my spouse owes the back child support and the children are not mine how do I file so that my stimulus check isn't also used for those back payments

[ReginaM]

Yes, If you and your husband filed a joint return, the IRS will withhold your stimulus payment to pay for the back child support.  If you filed a separate return, then you would receive your stimulus payment. 

[fanfare]

IRS can readily see that one person owes and the other does not.

Where does it say that both filers have to give up their payment?