This site is demo - you can test here functionality of this script. Script can be set to:

• require captcha verification
• send a postcard after sender confirmation by email
• dont send postcard by email, just generate the url which will contain postcard
• give user posibility to upload own photo and send it as a postcard
• script include web administration, its SEO friendly and fast

More information on http://www.bqscripts.com/item/postcards/

Actual settings: captcha, email activation, send by email to receiver