Date of Customer Contact in Process Receivables

All,

When we generate the worklist and get into the Process Receivables,under the Customer Contact tab there is a field that defaults the Date of Customer Contact (Cust. Contacts Since)  does any one know how this date is calculated and displayed? If we need to default to some date that we want, can that be achieved without any ABAP development?

Normally this date is defaulted to a previous date (one month prior from today's date).

Thanks in advance for your inputs and help.

Thanks

Harikrishnan.K