Should I give my ex-spouse a copy of my 1095-A form? He states he rec'd a letter from the IRS stating they need this form from him, I pay all the premiums for our child.

He states he rec'd a letter from the IRS stating they need this form from him, I pay all the premiums for our child. Our agreement is that he claims our child every other year - this is the first year for him to claim our child. Child Support was calculated with him paying $15/mthly towards insurance. Shouldn't he just say that he pays $180 for insurance instead of entering my information from the 1095-A form? I have already filed my taxes and included the amounts from the form on my return.