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General statement on forks, airdrops, migrations and the addition of new cryptocurrencies
Any announcements regarding forks, airdrops, migrations, and the addition of new cryptocurrencies will be communicated via email, our blog and our Twitter feed.
Kraken makes no promises, guarantees or warranties on the outcome of potential or proposed forks, airdrops, or migrations, and no promises about the addition of new cryptocurrencies in general.
Clients should not assume that Kraken will list or credit any fork, airdrop or any other cryptocurrency.
If you wish to participate in a fork, airdrop, or migration, please withdraw the affected cryptocurrency to your own private wallet (Kraken is not a wallet service) well ahead of the deadline.

Forks explained

There are two main types of forks:

1. Uncontentious

Uncontentious forks are protocol changes that have been planned and agreed to by the community without any significant disputes. The intention is for everyone to switch to the new chain and no longer use the old one. However, the old chain may still survive due to some miners continuing to mine on it.
Example: Monero had a scheduled network upgrade on April 6, 2018. Even though nearly all the community moved over to the new chain, some still used the old chain and it became known as Monero Original. However, Monero Original did not meet Kraken's listing requirements.
Another example of a scheduled protocol change is Ethereum's 'Constantinople' hard fork.
Kraken's policy: We generally support the new chain in uncontentious forks and discontinue using the old chain. Account balances are converted to the new chain and funds on the old chain are no longer accessible by clients. If for whatever reason you want to have continued access to the old chain, we always recommend withdrawing the relevant cryptocurrency before the fork.

2. Contentious

Contentious forks happen when there is strong disagreement about the direction of a cryptocurrency or its proposed protocol change (or lack of protocol changes). In a contentious fork, both new and old chains are maintained by the community and compete for dominance and branding.
Examples: Ethereum vs Ethereum Classic, Bitcoin vs Bitcoin Cash, Bitcoin Cash vs Bitcoin SV.
Kraken's policy: We like to avoid taking sides and prefer a wait-and-see approach. The funds associated with the cryptocurrency before the fork will typically continue with the chain that is most dominant (has the most hash power and block confirmations). We cannot guarantee support for the less dominant chain.

Airdrops explained

Airdrops are when the founders of a new coin decide to give some of it away to holders of another coin as a form of promotion.
Kraken's policy: We have no control over which airdrops are sent to our corporate wallets while we hold your funds. In order to pass down an airdrop, we would need to support that cryptocurrency on our platform. However, the vast majority of airdropped cryptocurrencies do not meet our listing requirements. Stellar Lumens (XLM), Spark (FLR) and Songbird (SGB) are the airdrops we have supported to date. Even if we end up supporting an airdropped cryptocurrency later in the future if it does meet our listing requirements, we are not obligated to credit airdrops that occurred in the past or which will occur in the future.

Migrations explained

Cryptocurrency migrations occur when a digital asset transitions from one blockchain or token standard to another. These migrations are often part of a project’s upgrade strategy to enhance scalability or functionality.
For example, a project may decide to upgrade from an ERC-20 token to a native blockchain, requiring users to swap their old tokens for new ones. In such a scenario, the project team will typically announce the migration and provide a timeline and instructions for users to follow.
Kraken’s policy is to evaluate the feasibility and potential impact of each migration on our platform and users. If the migration aligns with our security and operational standards, we will support it and handle the technical aspects to ensure a seamless experience for our users. Users will be informed of any supported migration through email, providing detailed instructions and timelines for any necessary actions.