We just filed taxes last week and claimed my husbands nc child. Without any forms. Because the mother refused to sign any forms. There's nothing about who gets to claim the child in the order and the mother didn't have any jobs that report wages I'll put it that way. So in this case the IRS approved us immediately and I'm looking forward to that check any day now.
If mom honestly can't file a tax return, (and isn't married and filing a joint tax return with her husband), then your husband may be ok in doing that.
However, an electronic approval does NOT mean that your husband filed correctly. Yes, you will get the refund, but the IRS has reinstated random audits, as well as specifically targeting audits regarding claiming children.
There are also new proceedures this year regarding a non-custodial parent claiming a child. It used to be that you just had to have the 8332 in hand, to provide to the IRS if they asked for it. However, the rule has always technically been that you are supposed to attach it to your return, however the IRS has been lax about that because of electronic filing.
Now however the IRS is cracking down on that and has re-defined form 8453 as an information submittal form. Now, if an ncp claims the child, and files an electronic return, the electronic return is supposed to include form 8332 electronically, and then the ncp is supposed to mail in form 8453 with a copy of the form 8332 attached.
Therefore, you can expect to get at least a mini audit if you do not do so.
Hopefully you did tell the truth when filing your return that the child does not live with you, and hopefully you didn't claim EIC for the child, because if you did, there is a very strong chance that you are going to be in a world of hurt with the IRS.