In real estate and real property law, peaceable possession is "holding property without any adverse claim to possession or title by another".Law.com dictionary

Quiet title is used to refer to the new owner's peaceable possession. Property title, or ownership, also includes possession, but is a greater property right than the latter. Therefore, peaceable possession may also refer to a tenant's, or lessee's, warranty of Quiet enjoyment, or require such for a quiet title action. Answers.com web site

Cotenants take property together in peaceable possession. John Houston Merrill, et al., The American and English Encyclopedia of Law (1890), located at Peaceable possession is sometimes defined in the negative, that is, a trespasser lacks it. Canadian Legal Information Institute web site

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