As viceroy, Pedro de Toledo introduced the papel sellado (literally, sealed paper). He expanded the naval forces and fortified the ports of Valdivia, Valparaíso, Arica and Callao.
The introduction of the sealed paper system by Pedro de Toledo signifies a move towards greater administrative control and security within the Viceroyalty of Peru. His expansion of the navy and fortification of key ports reflects his efforts to secure the coastal regions and assert his authority over them.