Adverse claim

What does Adverse claim mean in American Law?

The definition of Adverse claim in the law of the United States, as defined by the lexicographer Arthur Leff in his legal dictionary is:

In mining law, a formal assertion under oath filed with a government land office claiming the right to issuance of a patent to land or mining rights therein to oneself instead of to another claimant.

In bankruptcy law, a claim of right to keep property already in possesion, made against a trustee or receiver in bankruptcy who might assert the right to recover it for the bankrupt estate.

For the use of “adverse claim” in the law of adverse possession, see that entry.