When transactions are transferred from Oracle Payables to GL, their sources are automatically stamped as AP. What about their categories? Are the categories also the same for all the transactions or are they varied?
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If the categories are to be the same for all the journals emanating from Payables, then how could one defines Auto Reversal Criteria Set to reverse some of those journal in the following period?

Categories vary and are stamped by the system. E.g. "Purchase Invoices" for Invoice Journals, "Payments" for Payments Journals etc.

Thank Hasan. After asking the above question, I watched your videos which cover the transfer from Payables to GL. I paid a particular attention to the Sources and Categories of the journal entries, which were clearly, seeded.
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The reason for my question in the first instance is this:

-------- --Companies with a backlog of purchase invoices at period end will calculate the total amount owing from all the invoices that have not been entered. This single figure will then be entered in the General Ledger as an accrual journal. This enables the accounts to show an accurate liability figure and the accounting period to be closed on time. Once the backlog of invoices has been entered into Payables, the accrual journal has to be reversed in the following period. The accrual would typically also include recurring expenses that have been incurred but not yet invoiced. For example: telephone and utility bills. ------------------
-------- --What categories would be used to define the journal reversal criteria set of the backlog invoices journals, for example, to distinguish them from other invoices journal entered on time, into Oracle Payables?
-------- --Do we have to create categories for the backlog invoices journals, and use these categories in Accounts Payable? How? Please, shed some lights on this issue. Thank you once more.

System stamps the source AP and categories Purchase Invoice, Payment etc to the data coming from AP to GL. You do not have much control over it. Without customizations you cannot have system assign category Purchase Invoice to one group of invoices and Backlog Invoices to the other group. I hope this answers your question, if I understood it correctly.

Thank you Hasan.
Yes, you perfectly understood my question. This question is a reality one, whereby big organizations often face backlog of invoices in most months, which, once entered in the following month, have to be reversed, as they have been captured (one total figure of the invoices)in the current month as accruals.
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I agree with you that customization by creating a new AP category, say, "Backlog Invoices" would achieve the desired functionality.

If they have to enter one lump sum invoice in the system because of the backlog then this lump sum invoice should be canceled (reversed) directly in AP as of the next month (not in GL). Ideally we should not be reversing subledger data in GL. The source AP should be frozen meaning no deleting/reversing allowed for AP journals.

Thank you very much for the information, Hasan. I am grateful!