Cancellation of debt a key element of most restructurings generally triggers taxable income. The German tax authorities had issued an administrative decree (the "Tax Restructuring Decree" - Sanierungserlass), however, declaring that, upon the satisfaction of certain requirements and conditioned on forfeiture of any loss carry forwards, the cancellation of debt income ("CODI") would not be taxed.

Reverse cross border mergers could become a popular device for UK companies seeking to maintain and preserve “passporting” or other EU rights.

The mechanism of a reverse cross-border merger (in this context whereby a UK parent company merges with their continental European subsidiary) has not historically been permitted under English law. However the provisions of an EU directive implemented in the UK in 2007 changed that position giving UK company groups that option.

On 13th August 2013, the US Department of Justice (DOJ) and attorneys general from six US states and the District of Columbia filed suit in the US District Court for the District of Columbia to block the merger between US Airways and American Airlines. Days before, a group of American Airlines customers filed a claim that the merger would violate Section 7 of the Clayton Act.