InfoPath Dev

The form is stored in a document library in Sharepoint.  The users launch the form from there, fill it in and click the Submit button. The forms are being sent by a number of individuals and two different users have experienced the duplicate form problem so far. The emails are going internally to another address within our organisation ...

I am new to Infopath and have managed to create a form which will, when the user presses the Submit button on the ribbon, send the form to a pre-determined email address.  The form seems to have been working successfully for most users (they have, in total, sent around 50 forms already), but there have been two occasions now where the ...