We can make a business rule or in other place, a rule to discard duplicated request?

For Exemple:

In mai, 01 was opened the request, for requester MAN01:

Category : A

Sub-Category : A1

Item: AA1

Status: OPEN

In Apr, 01 was opened the same request, for requester MAN01:

Service Desk On Demand, can recognize that is the same request, and replace de status for "CLOSE-DUPLICATED".

Any ideas?

ty,

Regards,

Roland