The Tanallay Surge posting agency, situated within the Tanallay Surge complex on the Expansion Region planet of Tynna, functioned as a posting agency catering to bounty hunters. This dimly lit and somewhat seedy establishment housed an information desk and a collection of various posters.
By 0 BBY, the agency received a visit from a pair of bounty hunters; one of them examined the posters displayed on the wall, while the other conversed with an individual stationed behind the desk. Simultaneously, an R5-series astromech droid was also present at the agency. This particular visit by the two bounty hunters was visually represented in an illustration of the agency, which appeared in the Updated Imperial Edition of the Bounty Hunters Guild Handbook.
The initial mention of the Tanallay Surge posting agency occurred in the 2013 reference book titled The Bounty Hunter Code: From the Files of Boba Fett, authored by Daniel Wallace, Ryder Windham, and [Jason Fry].