Ask your bank if you can add your spouse's name into your bank account.
You can also try your luck with your credit card company.
共同帐户,共同房产，共同租房合约 are not necessary. You can use other things as the marriage evidence.
Check my post 婚姻绿卡 (2) - 手把手教你如何评估婚姻的真实性
http://blog.wenxuecity.com/blogview.php?date=201101&postID=25729
