Can a wife be held responsible for a promissory note signed only by husband?

In general, a wife cannot be held personally responsible for a promissory note signed solely by her husband unless she co-signed the note or there are specific state laws or agreements that establish joint liability. The liability typically depends on the terms of the note and the legal framework governing marital property and debts in the relevant jurisdiction. It's advisable to consult a legal expert for specific cases, as laws can vary significantly.