Ecuador has revoked the citizenship of Julian Assange, the founder of Wikileaks who is currently in a British prison.

Ecuador’s justice system formally notified the Australian of the nullity of his naturalisation in a letter that came in response to a claim filed by the South American country’s Foreign Ministry.

A naturalisation is considered damaging when it is granted based on the concealment of relevant facts, false documents or fraud.

Ecuadorian authorities say Assange’s naturalisation letter had multiple inconsistencies, different signatures, the possible alteration of documents and unpaid fees, among other issues.

Carlos Poveda, Assange’s lawyer, told The Associated Press the decision was made without due process and Assange was not allowed to appear in the case.