Services required: Google Mail, Google Form, Google Spreadsheet
Create custom script on Google spreadsheet that links to a form and automate an email response back to the email address merge-tagged with a unique value.
1. Administrator copy and pastes 8 digit voucher codes in Column E from another source (e.g. all the way to row 1000)
2. Anonymous fills out a form with First Name, Last name, Email address and click submit.
3. Email addresses gets inputted onto the spreadsheet by the system; script validates the email address and sends an html response along with a value in column E (one voucher code) to that email address.
*if email address is not valid, don't send the email.
*one email submitted gets one unique voucher code only, no voucher code should be sent to two different addresses.
*only one submission is allowed from the same email address