Common law of sister states

Wis. Stat. § 889.05
in effect
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The unwritten or common law of any state or territory of the United States may be proved by parol evidence, and by the books of reports of cases adjudged in its courts.
Source: WI Statutes (Official Site)URL: https://docs.legis.wisconsin.gov/document/statutes/889.05Fetched: 10/7/2026
Wis. Stat. § 889.05 — Common law of sister states | Wisconsin Statutes (updated through 2025 Wis. Act 247) | Corpus