Credit networks are a type of decentralized payment infrastructure with no central currency, but where nodes extend each other various amounts of credit, using IOUs whose value depend on the trust between the transacting nodes. An independent and anonymity-preserving alternative to traditional payment systems in theory, actual implementations of credit networks so far have relinquished anonymity, and sometimes also decentralization, in order to overcome the risk of Sybil attacks. We suggest a possible implementation of credit networks that combines a fuzzy notion of anonymity and trust with a decentralized and localized system to achieve resistance to Sybil attacks. MP3