A Proceeds of Crime Act hearing at Teesside Crown Court heard he had so far only paid back £121 of the £679,073.62 he was found to have benefited from after faking his own death.
Darwin, 63, of Seaton Carew, did not challenge the application by the Crown to have the money removed from his bank accounts, which are the subject of restraints.
The pensions were understood to be earned from his time as a teacher and a prison officer.
Anne Darwin, now split from her husband, has repaid over £500,000 under a separate order after selling properties. She still has around £177,000 to pay.
Darwin was reported missing in a canoe in the North Sea in March 2002.
His wife collected over £500,000 in life insurance payouts, while he hid in their home, leaving their two sons to believe that he was dead. In December 2007, Darwin walked into a London police station, claiming he had amnesia, and was reunited with his sons who were stunned to hear he was alive.
His wife, who had fled with him to Panama, pretended to be shocked until a photograph emerged of them posing together after his supposed death. She was later jailed for fraud and money-laundering.