People in informal e-markets often try to deal with fraud and financial harm by sharing posts, screenshots, and warnings in social media groups. However, buyers and sellers frequently face further problems because these reports are scattered, hard to verify, and rarely lead to resolution. We studied these issues through a survey with 124 participants and interviews with 36 buyers, sellers, and related stakeholders from Bangladesh and designed Bonik Somiti, a socio-technical system that supports structured reporting, admin-led mediation, and accountability in informal e-markets. Our evaluation with 32 participants revealed several challenges in managing fraud, resolving disputes, and building trust within existing informal practices and the assumptions behind them. Based on these findings, we further discuss how community-centered technologies can be designed to support safer and more accountable informal e-markets in the Global South.

翻译：在非正式电子市场中，人们常通过在社交媒体群组分享帖子、截图和警告来应对欺诈与财务侵害。然而，由于这些报告分散、难以核实且极少促成问题解决，买卖双方仍频繁遭遇更多困扰。我们通过对124名参与者的问卷调查及对36名来自孟加拉国的买家、卖家及相关利益相关者的访谈，研究了上述问题，并设计了Bonik Somiti——一个支持非正式电子市场中结构化报告、管理员主导调解及问责机制的社会技术系统。通过对32名参与者的评估，我们揭示了在现有非正式实践及其背后假设中管理欺诈、解决纠纷和建立信任所面临的多重挑战。基于这些发现，我们进一步探讨了如何设计以社区为中心的技术，以支持全球南方地区更安全、更可问责的非正式电子市场。