add validated explanation

content/tutorials/get-started/get-started-using-python.md

@@ -226,6 +226,8 @@ The response fields that you want to inspect in most cases are:
 
 * `account_data.Balance` — This is the account's XRP balance, [in drops](basic-data-types.html#specifying-currency-amounts). You can use this to confirm that you have enough XRP to send (if you're making a payment) and to meet the [current transaction cost](transaction-cost.html#current-transaction-cost) for a given transaction.
 
+* `validated` — Indicates whether the returned data is from a [validated ledger](ledgers.html#open-closed-and-validated-ledgers). When sending transactions, it's important to ensure that the results are in a [final](finality-of-results.html) state in a validated ledger before further processing the transaction. For more information about best practices for transaction processing, see [Reliable Transaction Submission](reliable-transaction-submission.html). 
+
 For a detailed description of every response field, see [account_info](account_info.html#response-format).