Address whitelisting is an optional security feature that allows crypto withdrawals to only be sent to verified addresses stored in the Address Book. On Coinbase International Exchange, this feature is referred to as "Allowlisting".
To enable or disable whitelisting your Address Book:
Sign into Coinbase International Exchange
Click on the "Accounts" tab on the left navigation bar
Toggle “Allowlisting” to enable/disable Address Book whitelisting
The 24-hour activation period exists for security purposes when making changes to the whitelisting settings.
When enabling Allowlisting: No activation period
When disabling Allowlisting: 24-hour activation period exists before Allowlisting is fully disabled.