Hi,

With the creation of objects you have the flexibility to create the same objects with the same name… it is only their ID that is unique (for users it is the user name).

To enforce unique values, you will need to create validation / workflow rules or use a custom action on the specific object, e.g. Customer object, to prevent the creation of a customer with the same name of an already existing customer.

I would recommend to speak to your Professional Services Consultant for assistance.

@woodsie - I do that very same validation, and have it configured as such:
 

Thanks @edwardlau I assumed that this would have been a fairly common problem and someone would have a functional solution such as this.