General principles of law are core legal ideas shared across major legal systems—like due process, equity, good faith, and fairness.

They function as gap-fillers in international law when treaties and customary rules are silent or unclear. Courts rely on them to reach outcomes that are legally sound and system-consistent, especially in cross-border disputes involving liberty, procedure, or cooperation between states.

⚡⚡
Medium–High yield in Public International Law and Political Law. Often tested under sources of international law (Art. 38, ICJ Statute) and in extradition problems, where courts balance individual rights against international cooperation.

A common trap is assuming domestic constitutional rights apply wholesale to extradition.

Government of the United States of America v. Purganan, G.R. No. 148571, September 24, 2002 (Supreme Court; Lawphil).

The U.S. sought the extradition of Mark Jimenez under the RP–US Extradition Treaty. Jimenez applied for bail during the pendency of extradition proceedings, arguing entitlement to provisional liberty.

The Supreme Court reversed the grant of bail, holding that extradition proceedings are not criminal in nature, so the constitutional right to bail does not automatically apply.

Bail may be allowed only in exceptional circumstances, such as when detention would be clearly oppressive and supported by special humanitarian considerations—none of which were shown.

🥜 Bail is generally unavailable in extradition cases; it may be granted only in exceptional, humanitarian circumstances because extradition is not a criminal prosecution.