Yes. Usually the Plaintiff has to prove the charges that accompany the suit. However, if the defendant has not provided enough proof to the collector/creditor that a bill/charge is fraudulent before the suit was filed he or she will need to use the invalidness of the debt as their defense.
yes
If they've sold your case to a collection agency, they have been "paid" for your debt with the money the collection agency gave them for your case, so, no, they can't legally sue you - as far as I know.
Sue them for wilful noncompliance and harassment.
A creditor can sue you over a debt. If you are paying them anything at all or offering to pay them anything at all, they aren't likely to sue you just to make you pay a higher dollar amount per month.
When your account is turned over to a collection agency all the infornmation goes with it. In other words, whatever you put on the original application for the card. Home and work #s, home address, name and address of employer, income, etc. The collection agency does just that collects (or tries to). They cannot sue you without the consent of the original creditor. If that happens, your account is referred to an attorney who specializes in collection. Lenders do not want to sue. It is time consuming and expensive and the majority of suits are uncollectable. They are almost always willing to negotiate terms you can afford. Know your rights as a consumer and stand up for them.
Yes.
Yes, a hospital can sue you for nonpayment. If you fail to pay your hospital bill, the hospital will report your account to a collection agency.
No you can not
Yes.
Yes.
YES
Unless you have a specific repayment plan that the collection agency agreed to, there is no legal reason that cannot sue the cosigner.
Any collection agency can, in theory, sue you anywhere they can find you. Whether or not they have jurisdiction or a valid claim and whether you have defenses would depend upon the circumstances.
yes
If you are not refusing to pay and you pay the debt, they would have no reason to sue you. If you refuse to pay a valid debt, they may advise their client to sue you depending on what state you are in and what the laws are there. Some states only allow original creditors to sue and not the collection agency.
yes
Yes, you can be sued over an outstanding debt. If you fear that you will be sued, you should call and set up a payment arrangement to cover the bill.