Always ask your hosting firm about this information!

The below mention information is best practice to minimize level of blackmailing 

1.  Ask this information about Server Panel

1. Panel name: ?
2. Panel URL:  ?
3. User Name: ?
4. Password: ?

2.  Ask this information about  DomainPanel

1.  Domain’ Panel URL: ?
2.  User Name: ?
3.  Password: ?
4.  Secret Code: ?
5. Customer ID: ?
6. PIN: ?
7. NameServer:  ?