Social work research often requires the exploration of sensitive topics that concern hard-to-reach populations. In order to gain access to these groups, researchers are often forced to rely on gatekeepers during the research process. Gatekeepers become intermediaries who help the researchers to establish this access. In this article, we focus on institutional gatekeepers and the circumstances under which they deny access to research participants. And how the researchers themselves react to this situation in the context of Czech social work research. We used qualitative research, in particular semi-structured interviews with researchers. Based on the research, we identified three main practices of researchers when gatekeepers refuse access. These are conducting research despite denial, making changes to methodology and conducting covert research. The identified procedures bring with them a number of ethical questions that need to be addressed.