regionalization for cartridge

[aidam]

HP 3720 refuses re-regionalization for cartridge

[KrazyToad]

@aidam

Welcome to HP Community

I have gone through your Post and would like to help

I suggest you contact HP Support in your region for help with the Regionalization Reset

1) Click on this link - www.hp.com/contacthp/ 
2) Select your product type below.
3) Enter the serial of your device. 
4) Select the country from the drop-down. 
5) Select the chat or get phone number options based on your preferences. 
6) Fill the web-form and proceed further.
 

Thank you

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.