Kim submitted paperwork on behalf of her younger brother who was infected with HIV aged 16 and died in 1998.
She was told in writing that her application had been successful and her family would receive £100,000 on 7 December.
But on 25 November she received a follow-up letter saying the interim payment would not be made until she could provide extra documents proving she was the legal beneficiary of her brother’s will.
“I’m just shocked that we can be treated with such contempt,” she said.
“It’s unbelievable, frankly, and I wouldn’t trust them to administer anything, let alone a scheme like this.”
She said some bereaved families had already made financial decisions based on the compensation they were expecting to receive.
