Posting Periods for Realized Gain and Loss
When a payment is applied, the currency revaluation posts in the later of the source transaction or the payment transaction period, provided that period is open. An invoice, vendor bill, or journal entry is the source transaction. The payment transaction can be a payment, credit memo, customer deposit, or journal entry.
If the source and payment transactions are both in closed periods when the payment is applied, the accounting preference Default Posting Period When Transaction Date in Closed Period determines the currency revaluation posting period. The posting is in either the current period or the first open period, depending on the value selected in the accounting preference.
A realized gain or loss can post in an adjustment period only if the journal for the later of the payment or source transaction is posted to that same adjustment period.