Leaving Bolivia by Laguna Verde
Hi, this for future time:
The Bolivian border south of Laguna Verde (from you can head on to Paso Jama-Argentina or to San Pedro Atacama-Chile) is only MIGRATION post (for humans), not CUSTOMS office (for vehicles).
It happened to me at Laguna Verde, the clerk received (he shouldn´t) my TIP, but the bike-exit was not registered anywhere and I had problems when I got back coming from Brazil. They said I should have given back my bike´s temporary permit at ORURO custom office, which is the head office for that area.