The involuntary auction sale is brought about as the result of the enforcement of some lien upon the property. A lien, it will be recalled, entitles the holder in the event of non-payment to satisfy it from the property. The lien may have originated in a voluntary act of the owner, e.g. borrowing on mortgage, but the lien once coming into being its enforcement may be secured entirely without the owner's volition. The owner having defaulted in payment, the law gives the lienor the right to have the property sold. From the proceeds of the sale, the amount of the lien and interest and all expenses are paid, and the balance belongs to the owner. A public auction sale, in theory of law, will bring the greatest price, hence all sales to enforce liens must be of that kind. The sale follows a legal action in which the lienor's right has been established.