Referring to the results of an ethnographic research concerning streets mechanics in the Parisian suburbs the paper aims at looking at informal economy through a practice-based perspective, with a particular emphasis on the activities that constitute its articulations. Looking at the daily work of unofficial mechanics, we will show the relationships of cooperation and trust that mechanics seek and mend both in the relation with the customer, as in the one with the wider social context in which they operate. This enables unofficial mechanics to create different services for customers and gain recognition and legitimacy despite the violation of laws, making the boundaries between formal and informal economy increasingly porous.
Keywords: Work practices, informal economy, ethnography, illegalism, trust