The doctrines Puerto Rico courts name when they cite: mined from the sentence each citation lives in, keyed on the citing court, counted by distinct opinions. Entry by issue, not by case: pick one to see the cases on each side.
| # | Issue | Most-cited case | Opinions | Courts | Years | Last 5y |
|---|---|---|---|---|---|---|
| 1 | pueda corregir un error | García Morales v. Padró Hernández | 55 | 2 | 2005–2025 | 42 |
| 2 | due process clause | Mora v. Mejias | 24 | 2 | 1925–2013 | 0 |
| 3 | Este error | Plan de Bienestar de Salud de la Unión de Carpinteros de Puerto Rico v. Seaboard Surety Co. | 18 | 2 | 1926–2023 | 6 |
| 4 | base del alegado error | Dávila v. Antilles Shipping, Inc. | 13 | 1 | 2006–2026 | 11 |
| 5 | fundamental principle | Larned v. Jenkins | 12 | 1 | 1916–2010 | 0 |
| 6 | commerce clause | American Steel & Wire Co. v. Speed | 11 | 1 | 1912–2012 | 0 |
| 7 | ease bar | Succession of Filhiol | 11 | 1 | 1934–1972 | 0 |
| 8 | Primer error | Corpak, Inc. v. Ramallo Bros. Printing, Inc. | 10 | 2 | 1930–2026 | 7 |
| 9 | res ipsa loquitur doctrine | San Juan Light & Transit Co. v. Requena | 10 | 1 | 1912–1971 | 0 |
| 10 | Segundo error | Corpak, Inc. v. Ramallo Bros. Printing, Inc. | 10 | 2 | 1926–2026 | 6 |
| 11 | cometido un error | Bourjois, Inc. v. Chapman | 7 | 2 | 1947–2024 | 1 |
| 12 | menos que exista error | Benítez Guzmán v. García Merced | 7 | 2 | 1989–2025 | 1 |
| 13 | pesar del error | Izagas Santos v. Family Drug Center & Convenience Store, Inc. | 7 | 2 | 2017–2025 | 6 |
| 14 | saving clause | Demarse v. Bruckman | 7 | 1 | 1926–1987 | 0 |
| 15 | sound doctrine | Hyland v. City of Eugene | 7 | 1 | 1904–1970 | 0 |
| 16 | affirmative defense | Burlington Industries, Inc. v. Ellerth | 6 | 1 | 1926–2013 | 0 |
| 17 | cometido error | People v. Jefferson | 6 | 1 | 1936–1963 | 0 |
| 18 | generally accepted rule | Ungemach v. Ungemach | 6 | 1 | 1937–1969 | 0 |
| 19 | menos que el error | Pearce v. United States | 6 | 2 | 1924–2024 | 1 |
| 20 | prejudicial error | People v. McShann | 6 | 1 | 1910–1968 | 0 |
| 21 | second assignment error | Bisconer v. Billing | 6 | 1 | 1923–1962 | 0 |
| 22 | Tbe motion | Bell v. Germain | 6 | 1 | 1906–1934 | 0 |
| 23 | base del error | Dávila v. Antilles Shipping, Inc. | 5 | 1 | 2024–2026 | 5 |
| 24 | cualquier error | Pueblo v. Nicolás Millán | 5 | 1 | 1947–1968 | 0 |
| 25 | English rule | Bangs v. Dunn | 5 | 1 | 1921–1956 | 0 |
| 26 | equal protection clause | Lindsley v. Natural Carbonic Gas Co. | 5 | 1 | 1932–1989 | 0 |
| 27 | exclusion clause | Murray v. Western Pacific Insurance | 5 | 1 | 1949–2023 | 1 |
| 28 | Tercer error | Ana María Sugar Co. v. Castro | 5 | 2 | 1926–1996 | 0 |
Top 28 by distinct citing opinions.