After scanning, forwarding or uploading your invoice, you will indeed have the option to check your read data and to make corrections before confirming. Please always note the amount and the (free) statement.
The account number of the recipient and a statement that is recognized as a structured statement, are verified for correctness by POM. The name of the recipient is taken from the POM list of accepted recipients.
It is best to carefully check the remaining values yourself before confirming. If not correct, you can adjust them or you can add your invoice again. Upon confirmation, they are no longer changeable.