Usually there is no info message as you settle transactions. Those are just settled.
there are multiple ways to find
1) the transactions which will be fully settled, will not appear under open transactions. Only those transactions will appear, which are partially settled or has not been settled at all, as you will proceed for transaction settlement.
2) lets suppose you have multiple transactions for a customer and few of those are settled already whereas others are open, go to that customer, click transactions, now for each customer transaction, you can see in the settlement Tab, what amount has been settled and what's still remaining amount.