Under Maryland law, a creditor can record a judgment from any other state in Maryland with the intent to attach property you own in Maryland. The creditor can seek to levy against your jointly owned property with your sister if titled as Tenants in Common. The county/city sheriff could then auction off your half share of the property to the highest bidder. The new owner of your half interest could then sue your sister for partition in lieu of sale of the property or require your sister to buy his/her 1/2 interest in the property.