This study investigates congratulation strategies used by Jordanian EFL postgraduate students. It also investigates the types of positive politeness strategies in the congratulation speech act. Data were collected using an adopted version of discourse completion test (DCT) by Dastjerdi and Nasri (2013). Data were encoded and analyzed based on the taxonomy of congratulation strategy proposed by Elwood (2004). Furthermore, data were analyzed based on a modified version of positive politeness strategies proposed by Brown and Levinson (1987). Findings revealed that the most frequently used strategies of congratulation were illocutionary force indicating devise (IFID), offer of good wishes, and expression of happiness. Regarding the positive politeness strategies, findings revealed that the most frequently used strategies by the participants were giving gift to listener, exaggeration, and in-group identity marker. The study concludes with a discussion of important directions for future rese