Users can also link accounts by setting "sub accounts", each with its own identity, under a primary account. The system reserves a bond for each sub account. An example of how you might use this would be a validation company running multiple validators. A single entity, "My Staking Company", could register multiple sub accounts that represent the Stash accounts of each of their validators.

An account can have a maximum of 100 sub-accounts. Note that a deposit of 20.053 DOT is required for every sub-account.

1. Go to the Accounts UI. Click on the three vertical dots corresponding to the account to which you already set the identity. You should see an option to set onchain sub-identities. Click on it.

2. In the pop-up window, select your Ledger account from the dropdown and enter text in sub name field. Then, click on set subs button.

3. Sign and submit the transaction from the parent account with the identity.

You should now see the sub-identity displayed on-chain.