A source system receives initial identification data of a listing related to an entity. The source system searches a provider system for one or more listings having identification data matching the initial identification data. The source system receives, from the provider system, a plurality of potential matching listings having identification data matching the initial identification data, wherein each listing of the plurality of potential matching listings has a corresponding confidence score assigned by the source system, and wherein each listing of the plurality of potential matching listings has a corresponding provider-supplied external identifier assigned by the provider system. The source system designates a representative listing of the entity located on a provider system from among the plurality of potential matching listings, the representative listing having the highest confidence score assigned by the source system. The source system transmits, to the provider system, a request to synchronize the representative listing having the highest confidence score assigned by the source system as the representative listing of the entity on the provider system, the request comprising a first provider-supplied external identifier. The source system receives, from the provider system, an indication that a second listing of the plurality of potential matching listings has been selected by the provider system as the representative listing of the entity on the provider system, the response comprising a second provider-supplied external identifier. The source system re-designates the second listing as the representative listing of the entity on the provider system and designating the remaining one or more remaining listing of the plurality of potential matching listings as one or more duplicate listings on the provider system. The source system transmits, to the provider system, a request to suppress the remaining one or more listings as one or more duplicate listings, the request to suppress the remaining one or more listings comprising one or more third provider-supplied external identifiers.