When Invoice batch is posted, and sent to Factoring or Accounting system, there will be shown sent mark inside the batch for each invoice:

However, sometimes, users need to adjust one invoice or delete it from the batch and resend it with another batch.

In such situations, first, the batch needs to be unposted by using the Undo button from the top three dotted button:

Once it is undone, sent mark will be refreshed to "not sent":
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Then one can delete one invoice from the batch or change it using again three dotten button:

After deleting the right invoice, now it does not need to be sent to factoring since it is already sent. It needs to be marked as sent but do not email to factoring or customer:

This way, these left invoices will not be sent to factoring but marked only sent and it is done with this batch: