In late 1961, before a general amnesty was granted to members of APRA, Villanueva entered Peru clandestinely. He needed to start organizing the multiple party cells in preparation for their return to full political activities. Afraid that he would be caught, he sought refuge at his cousin's house in San Isidro. Ana Maria Villanueva de Riva-Vercellotti was married to an Italian, and Armando was convinced that Peru's secret police would never find him there. He was able to stay there, unperturbed, till full amnesty was granted.