There is an increasing amount of data being made available online for re-use. Indeed, as researchers, we are encouraged to make use of these data resources. Issues such as value for money, reproducibility and efficiency are often cited as reasons for this re-use. Nonetheless, many researchers are hesitant about re-using data from sources (organizations or individuals) that they do not know personally. These hesitations are not only about properly trusting the data sources, but also concerns about how best to give credit to the original data creators. There is also confusion surrounding open licenses, such as Creative Commons, and how to abide by them in future work. In this session we discuss and concerns around some of the issues surrounding re-use.