They don't sell cars to "couples" they sell cars to individuals. If there is one name on the contract, and that name has a signature, then the car is sold. They don't care if your spouse is in agreement. The spouse is not a factor in the contract.
Yes, this is true provided that your spouses name is not on the sales contract.
If you spouse is on the sales contract then it is not completed until he/she signs.
No you wil have to ge a court order to recover it.
The primary duty in a marriage contract is the duty to be faithful to your spouse.
The obvious answer is to ask your spouse. If that is not an option, have your divorce attorney ask your spouse's attorney. You can call the IRS and ask them if by any chance a joint return has been filed with your name on it, but they won't tell you if your spouse filed a separate return. If none of that works, file a separate return (married filing separately, not single). If civil relations are ever restored with your spouse, you can talk about matters and file an amended return later.
No. Not unless the signor has been granted POA (Power Of Attorney) by the spouse. Without a POA the contract would not be binding.
On your MFJ income tax return you do not have a choice about claiming your spouse. Your spouse would not be claimed as a dependent exemption on your MFJ income tax return. You have one exemption for each spouse on the MFJ income tax return and all gross worldwide income is combined on the married filing joint income tax return.
The ownership of any vehicle is determined by the titling of said vehicle. If a married couple resided in a community property state and the vehicle was titled in one or both names at the time of the spouse's death, the vehicle belongs to the surviving spouse. In non CP states the probate laws apply, although it is a general rule that at least one vehicle is the property of the surviving spouse. Both situations are based upon the vehicle not having a lien, either for the original loan or other matters. If a vehicle is not owned freely and clearly at the time of the owner's death, the lending contract must be reaffirmed or the vehicle becomes a part of the probate procedure and succession laws apply.
No...really spouse only
A person cannot sue their spouse for breach of marriage contract. They can however sue them for divorce and end the contract of marriage.
Basically that is what a divorce is. So, get a divorce.