Cross-border litigation support works best when the originating lawyer and local counsel do different jobs on purpose. Confusion starts when both lawyers assume the other one owns strategy, client communication, or procedural detail.
Keep strategy close
The lawyer with the client relationship usually keeps the case theory, commercial context, negotiation position, and client reporting. That is the part of the file most likely to be misunderstood if handed over casually.
Delegate local acts
Appearances, filings, service, registry checks, court logistics, and local procedural advice are often the right work for local counsel. These are tasks where admission and local habit matter.
Define authority
Before a hearing or filing, state what local counsel can agree to, what must be referred back, and who receives urgent calls. Authority limits protect both lawyers.
Ask for usable reporting
A short report should include what happened, what was filed or ordered, dates created by the event, and recommended next steps. That lets the originating lawyer brief the client without chasing detail.
The goal is not to split the matter in half. The goal is to put the local part in the hands of someone local while preserving one clear professional lead.