RE: clarity...
Looks like you're doing some digging there gadfly.....good dd.
Essentially, Villar was acting on behalf of Lopehandia. He travelled to Santiago and met with one of his long time trusted business associates. In the course of business, he was asked to sign some documents on the dotted line just as he had routinely done in the past. Turns out things weren't what he was led to believe.
Since he was the one who was personally involved, his name appears on the court documents. Think of it as being similar to a director or an officer of a company signing on behalf of that company. Although the acting director may be the one whose name or signature appears on a contract, it simply represents the entity of the company that employs him.