Which of these is likely to be the lien with the highest priority?

A mechanic's lien is filed by contractors or suppliers who have provided labor or materials for a property but have not been paid. While important, mechanic's liens usually rank lower than tax liens, as they are seen as voluntary debt incurred by the property owner, unlike tax obligations mandated by law.

Mortgages are loans secured by real estate, and they typically have a lower priority compared to tax liens. If a property is sold due to tax foreclosure, mortgage lenders may lose their claim to the property, as tax debts are settled first. Therefore, mortgages are generally secondary to tax liens in terms of priority.

An attachment lien is used to secure a creditor's claim against a debtor's property before a judgment is rendered. While it serves to protect the interests of creditors, it holds a lower priority compared to tax liens, which are prioritized to ensure the collection of public funds owed to the government.