An Orthen invitation is given to the player automatically once they reach level 90 Archaeology. It is an invitation to the Orthen Dig Site from Mr Mordaut.
The invitation is only an informative invite to the dig site, and is not required in interacting with the dig site. It is not possible to reclaim the invitation once it has been destroyed.
Ah, yes, Player,
Please head to Anachronia at your earliest convenience!
Recent volcanic activity has uncovered some astounding
dragonkin artefacts among the ruins of Orthen - the
dragonkin's 'first city' here on Gielinor! Meet with me at
base camp! I have the cheese; you bring the crackers!
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