Half certificate

Half certificates are used during the Shield of Arrav quest. When a player returns their half of the Shield to Curator Haig Halen of the Varrock Museum, they will receive one half of the certificate, depending on whether they joined the Phoenix Gang or the Black Arm Gang. There are two different certificate halves. Once combined, one can not trade the full certificate.

The player will receive two copies of their half certificate, one of which must then be traded with a player from the other gang to receive the other half. When combined, the player receives a full certificate. The full certificate must be given to King Roald to complete the quest, and 600 coins will be given as a reward.

Trivia

 * Half certificates can be put into the party room chest, and other players can obtain them, even if they have finished the quest.