Underground Postal Service

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The Underground Postal Service (UGPS) is a delivery service in the Underground. Of its various functions, Clover only uses it to receive Mail and fast travel.

UGPS signs throughout the game, from Snowdin to Hotland, allow Clover to call the Mail Whale and use the UGPS services.

Main Story[edit | edit source]

The UGPS is the Underground's primary delivery service. In addition to delivering mail at their stations, they also deliver packages.^[1] Patrons can pay an extra fee to send priority mail, which is delivered to its recipient without them needing to stop at a station.

At the Snowdin - Forest sign, the Mail Whale flies down and delivers Clover their first letter. From then on, ringing the bell at any station calls the Mail Whale, who will deliver any new mail available. At the Wild East - Farm sign, the Mail Whale alerts Clover that the UGPS has started a new transportation service. From then on, Clover can additionally use the stations to ride in the Mail Whale's basket and fast travel between any station they have visited.

In the Pacifist Route, when Ceroba follows Clover through the Steamworks, she prevents them from using the stations. This is to stop them from bringing unwanted attention to themselves, but it also prevents Clover from seeing Starlo's warning until she has already left.

In a Genocide Route, after exhausting Snowdin's kill counter, UGPS stations will no longer function. Ringing them only results in the text "But nobody came."

Lobby Lad, an NPC in UG Apartments, says that the UGPS stations are soon going to be removed in favor of delivering mail straight to monsters' mailboxes.

Locations[edit | edit source]

Snowdin[edit | edit source]

Snowdin - Forest: In a long hall above the room with the snow castles and three rooms below the Honeydew Resort

Dunes[edit | edit source]

Dunes - West Mines: After the first Dimensional Box room in the Dunes
Dunes - Oasis Valley: Near the exit from Oasis Valley, right next to the building where Red is found
Wild East - Farm: In the Sunnyside Farm

Steamworks[edit | edit source]

Steamw. - Commons: Left of the area where Vendy is found
Steamw. - C. Station: In the crossroads after exiting either the Factory Wing on a Pacifist Route or the Chemistry Lab on a Neutral/Genocide Route, one room before the robot control room