2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105783We study the conditions of validity of generalized second law in phantom dominated era.8 pages, 2 figures. Typos corrected. References added. GSL in the transition time (from quintessence to phantom phase) discussed. To be published in Phys. Rev. DGeneral Relativity and Quantum Cosmologytext