Migros sells organic avocados from Mexico. According to The Wall Street Journal and other sources, the trade in avocados from Mexico is controlled by drug traffickers.

How does Migros check that the avocados it sells are not of controversial origin?
Thanks to

Sources
The Violent Gang Wars Behind Your Super Bowl Guacamole, Wall Street Journal
"Blood Avocados": The Dark Side of Your Guacamole, Vocativ