It doesnt, that why they asked their friend to do it. Some times the US later finds out that the arresting country’s courts found no authority or legality for

It doesnt, that why they asked their friend to do it. Some times the US later finds out that the arresting country’s courts found no authority or legality for their own country to arrest the person and wont continue with extradition. This happened in New Zealand. So typically a bit more research is needed and they find a way to get it right in future cases. Another thing the US does is send an FBI agent to merely observe the arrest, to ensure that it is later compatible with US courts as well. Its a lot of organizations to make happy but the US is essentially one of the only organizations with the resources and interest to bother. It is an interesting outcome of the nation state concept.