First, open [DApp] – [Staking Tools]
Make sure you are in ‘Stash account’ mode, and click ‘Unbond’
Enter the unbonding amount
After the unbonding period completed (for DOT is 28 days)
Switch to Controller account mode
Then you will see the ‘Withdraw’ button besides dismissed DOT, click the button and sign the transaction, then you will get these DOT to your balance.
1 Error caused by locked DOT
If you have participate Polkadot council election, you will need to quit Polkadot election lock as well, details:
2 Error caused by unbond all DOT
If you need to unbond all DOT, you need to cancel all validator selection first.
The steps are:
Go to Nominating Set page, and unselect all validators, and submit.
Then click Unbond, and click All, and submit.