Prosecutors may soon move one step closer to receiving broad new powers to serve criminal summonses on international companies that lack domestic agents or offices – a development with significant implications for international criminal enforcement, including anti-corruption enforcement.  In a guest article, Mara V.J. Senn and Whitney Moore, partner and associate, respectively, at Arnold & Porter LLP, describe the recommended changes to Federal Criminal Rule 4, which governs proper service of arrest warrants and criminal summonses, and the potential impact of those changes.  For more from Senn, see “How to Conduct an Anti-Corruption Investigation: Ten Factors to Consider at the Outset (Part One of Two)” (Dec. 18, 2013); and “Developing and Implementing the Investigation Plan (Part Two of Two)” (Jan. 8, 2014).