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Despite the benefits of using online social support groups, prior research does not provide a solid understanding of the online factors related to an individual’s supportive interaction. Accordingly, this study aims to explore how various aspects of anonymity predict different levels of social support engagement. The current study uncovers that visually identifiable group members are more likely to get supportive responses than are visually anonymous members. Also, when support group members are visually and discursively identifiable, they are more likely to get supportive messages than those who are visually and discursively anonymous. Additionally, the more identifiable support group members are, the more they receive positive messages. Practical implications for the role of social support group members’ anonymity/identifiability on the overall social support process are presented.