Set the transaction control deliberately
Rakuten places Purchase Lock in the Parental Control area of its website settings. Enable the option and configure the four-digit PIN there. The location of the menu does not make this simply an age classification setting: the described control locks purchase and rental transactions until the PIN is entered.
Separate the PIN from the password that manages it
The provider says the profile password is requested whenever the configuration changes. A person who knows the transaction PIN therefore has a different capability from someone able to change or disable the control with the account password. Keep those roles clear when deciding how a shared television should be used.
Reset a forgotten PIN through the documented account route
Rakuten says a forgotten Purchase Lock PIN can be reset in web settings using the profile password. That is the relevant recovery route for this control. Repeatedly guessing digits on a television is not the published procedure, and changing a subtitle or age-display preference would not reset the transaction lock.
Check the lock’s status on the intended screen
The help lists Purchase Lock on television, web and Roku devices and says its status can be checked in their settings. Review that status before handing over a shared remote. For example, entering the PIN to authorise an intended rental and changing the saved lock configuration are separate actions. Verify the intended configuration without making a trial purchase simply to see whether money can be spent.
Questions, answered
What unlocks the transaction itself?
The configured four-digit Purchase Lock PIN.
What is needed to change or reset that PIN?
Rakuten says the profile password protects those changes in web settings.