Greetings. I cannot answer tax questions - and instead I recommend that you speak with a CPA or tax attorney.
Without a separation agreement or court order, you cannot assure that she will pay on the credit card. If it is in your name and on your credit report, I would suggest that you monitor it on line and make the payments if she does not. If she gets the tax refund and deposits it into a joint account then she can use those funds without you realizing it and before you get the chance to stop her - yes. Thank you.
Janet L. Fritts
Attorney with Rosen Law Firm
4101 Lake Boone Trail, Suite 500
Raleigh, North Carolina 27607
919.787.6668 main phone
919.256.1665 direct fax
301 McCullough Drive Suite 510
Charlotte, North Carolina 28262
704.644.2831 main voice
704.307.4595 main fax
1829 East Franklin Street, Bldg 600
Chapel Hill, NC 27514
919.321.0780 main phone
919.787.6668 main fax
The response posted above is based upon the limited factual information made available and is not intended as a full and complete response to the question. The only reliable manner to obtain complete and adequate legal advice is to consult with an attorney, fully explain your situation, and allow the attorney sufficient opportunity to research the applicable law and facts required to render an accurate opinion. The basic information provided above is intended as a public service but a full discussion with an attorney should be undertaken before taking any action.