Interloper Law and Legal Definition

Interloper is a person who interferes with the affairs of others or intrudes in a place, situation, or activity. A trader operating without the license required by law is an interloper.

Where a party litigant has no financial interest or other right which could be affected either adversely or favorably by the outcome of the litigation, he is an interloper, and if he takes an appeal, or participates in an appeal taken by others, he is not entitled to an award of his costs and disbursements. [In re Trust by Bush, 249 Minn. 36, 52 (Minn. 1957)].