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description: api/v1
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# Blockchain Reorganization

In the event of a _blockchain reorganization_, similar to that in Bitcoin, subscriptions will receive one or more blocks that were previously thought to be in the difficultywise-longest well-formed blockchain. These blocks will be returned as a result of a new difficultywise-longest well-formed blockchain.![](https://docs.hycon.io/content/img/chain_reorg.png)**Figure 1** | In the event of a subscription trigger from a reorganization, the blocks inside the red box will be returned, wherein the height of the new difficultywise-longest well-formed blockchain is higher than the other.
