This course deals with transfers in complex fluids, which are ubiquitous processes in everyday life and industrial applications, as well as in geological or biological systems. Different types of transfers will be examined : first, drying and dissolution and, in a second part, wetting of a solid surface. The specificities of the drying of complex fluids will be highlighted, and associated phenomena such as glass transition, Marangoni effects, etc. will be described quantitatively in the light of recent literature. The mechanisms of the reverse process of dissolution will also be detailed. Then, starting from the description of the wetting of a solid by a simple liquid, we will see how introducing complexity in this multiphase problem (viscoelasticity, surface-volume exchanges, intermediate characteristic length scale, activity…) modifies the contact between media. The related challenges posed in industrial applications will also be detailed.