Hi, Holiday,

Selecting this option on the check reconciliation report will print account distributions that are entered at the time the check is produced (in Adagio).

For example, when you create a manual check with a Type of 'Cash payment', you enter the distributions on the 'New invoice detail' screen. It's these distributions that print on the check reconciliation report (as they weren't previously created when the invoice was entered into an invoice batch in AR).