This paper analyses the ways in which informal mediation channels facilitate service delivery in the Citizen Service Bureaus at the Municipal Corporation of Delhi and give rise to an interplay between formal and informal institutions. In particular, the personal backgrounds of brokers as informal mediators and how they ensure their acceptance amongst service seekers are explored. Further, the motivations of the service seekers to solicit help from these mediators as well as institutional responses from the municipal administration along with other relevant actors like the Government of National Capital Territory of Delhi are examined.