From www.bartier.com.au: Estoppel is a legal principle that can prevent a party from denying a previously established fact, highlighted in the case of Reed v National Contracting Services Pty Ltd, where a worker’s claim for surgery costs was evaluated.

The court determined that the worker’s worsening symptoms provided sufficient grounds to reassess the necessity of surgery, leading to a conclusion that no estoppel applied from prior decisions.

As a result, the court ordered the employer to cover the associated surgery costs due to the changed circumstances.