If you want visitors to your site to leave you information then you will need a form.
The data is stored in a file or emailed to you.

Intelligent forms
Intelligent forms do things with/to the data for example e-commerce, calculating quotations.

example: https://www.securedataspace.com/onlinebookings/hotelcanmascarosullastret/eng/booking_start.html

Considerations
If you are collecting personal information you may need to be registered under Data Protection Act relevant in your country. http://www.dataprotection.gov.uk

Security
Some data for example (Financial) must be entered and processed in a secure manner, this may require additional services. It is good practice to collect all data in a secure manner. Security Section

Contact Us about Forms