General Brazilian
manipular antiética/desonestamente
Most common usage in formal and informal contexts
Rio de Janeiro
manipular de forma desonesta
Colloquial variant commonly used in spoken language
São Paulo
manipular antiética/desonestamente
Formal usage, particularly in business and corporate contexts
Portugal
manipular desonestamente/de forma iética
More formal Portuguese usage; 'iético' sometimes used as opposite of ethical