The Ethereum beacon chain recorded a major strike event on September 10, with 40 penalized validators for having grown contradictory certificates.
The first reports indicated the validators’ nodes linked to the play, to Allnods and to the SSV network. However, a more in -depth chain survey has shown that most of the operators affected were linked to the ANKR.
Beacon Chain said that a validator had been “reduced” 0.3 ETH, which was worth around $ 1,300 at the time. If similar losses occurred throughout the group, the cumulative penalty could exceed $ 52,000.
What’s wrong?
The reduction occurs when validators act against consensus rules, often by publishing contradictory certificates.
Preston Vanloon, a basic developer Ethereum, explained that such errors generally appear when the validator keys are executed in several environments. In this situation, the nodes can see different views of the chain, leading to double signature and automatic penalties.
He said:
“These validators have published contradictory certificates.”
Vanloon also agreed that the question could have come from the creation of an error of affected companies while migrating a validator.


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Meanwhile, the developer Ethereum stressed that the validators had to continue to operate until they leave the network despite the fines.
According to him:
“Reduced validators are forced to continue to exercise their functions until they are out. If they are offline during the outing queue, they will have applied liveliness penalties. The reduction penalty has already been applied, so these are only the penalties of liveliness here. ”
Ethereum Slashing
The reduction in mass remains a rare event on Ethereum, as evidenced by the fact that, apart from the recent, there were only 15 cases of this type this year. Migalabs’ data shows that only 525 validators have faced reduction penalties since 2020.
However, the story shows how fast these events can degenerate and cause strong financial losses. In November 2023, nearly 100 validators linked to Bitcoin Switzerland lost nearly $ 200,000 because they were reduced for submitted incorrect certificates.
These cases highlight how operational errors can trigger immediate financial consequences in a system that applies consensus by economic discipline.
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