The good news is that you just need to get a visa that gives you permission to sign contracts. Once you have that you're good to go and can sign on the dotted line.
One tip to remember is that speaking Spanish will help you greatly. You'll be treated differently than if you speak English all the time, it'll help you assimilate to Peru, and it'll make talking to the immigration officers easier. If you're looking to learn Spanish, check out Fluenz Spanish, Rosetta Stone, and Synergy Spanish.
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