There are three main possible ways:1) If you signed anything personally guarantying the debt--in this case, you are in fact liable.2) If when you purchased the supplies, it appeared that you signed in a personal capacity (i.e. you were listed as the party, not the business).3) If it was not clear from the documentation or information, etc. provided at time of purchase that the business was a corporation, so that it was assumed that it was a sole proprietorship or partnership, and a judgment provided against you on that basis.If 2) or 3) was the case and you should not personally be liable, you may be able to get the judgment against you personally set aside. You are advised to retain an attorney to help you.