# How Limio Generates Zuora Subscription and Order Numbers

Limio generates all objects in its own application before they are sent to Zuora. All the subscriptions, orders and other objects used along the process will have their own identification provided by Limio to Zuora.

Limio creates internally a logical id consisting of a random 32-character hex (i.e *438e8bd66fc9df124771aedd7741abec*) and a reference number that is parsed from the hex consisting of 12 characters (i.e *23HQ5TCRU9S0*). Limio ensures the numbers are unique.

This reference number is the one used in the integration and sent as Zuora Subscription Number and Order Number. This is to ensure that Limio and Zuora objects have a clear and established relationship between them.


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