Eva Castillo has resigned as head of Bank of America Merrill Lynch's Europe, Middle East and Africa wealth division, according to an internal memo seen by Financial News.

It is understood Castillo, recently named as one of Financial News' 100 most influential women in the Emea financial markets, resigned her position before Sallie Krawcheck's appointment as overall head of wealth at the US bank last month. Castillo will remain in the job until December to ensure a "smooth transition", according to an internal memo to staff from Krawcheck this morning.