If the acknowledgement email failed to send, you can resend this from within the NetCommunity website.  To check this:
  1. Log into NetCommunity 
  2. Navigate to Email > Acknowledgments
  3. Locate the form being used in the list
  4. Click on the Message Report icon to the left of the acknowledgement email in question
  5. Click on the Messages tab
  6. Locate the email address that did not receive the acknowledgement. If the email failed to send, or encountered a problem, on the left hand side, there will be an icon to resend the email.
Additional notes: 

If the acknowledgement email did not encounter any errors and there is no option to resend, then you will need to manually send an acknowledgment email through your desired email provider or print a Donor Acknowledgement Letter in Raiser's Edge