The same commercial dispute frequently generates proceedings in more than one forum, and managing the relationship is a distinct task.
First-to-file. Where two federal actions overlap, the first-filed is generally favoured, subject to exceptions for anticipatory filings, forum shopping and the balance of convenience.
Abstention where a parallel state proceeding exists, on narrow grounds requiring exceptional circumstances, weighing the assumption of jurisdiction over property, inconvenience, avoidance of piecemeal litigation, the order in which jurisdiction was obtained, whether federal law governs, and the adequacy of the state proceeding.
Anti-suit injunctions restraining a party from prosecuting a foreign proceeding, available on a demanding standard and applied with attention to comity.
Multidistrict consolidation for pretrial proceedings where common questions exist across districts.
Consolidation and coordination within a single system, formal or informal.
Practical coordination. A single discovery record used in both matters where possible, coordinated protective orders, cross-noticed depositions, and a consistent factual narrative — because inconsistent positions across proceedings are the most damaging outcome of parallel litigation.
Preclusion. The first judgment may bind in the second, which makes the sequencing a strategic question rather than an administrative one.