How can I screen clients that try to register multiple times?

Posted by Aba Dov on Pro Webmasters See other posts from Pro Webmasters or by Aba Dov
Published on 2011-02-09T07:37:45Z Indexed on 2011/02/09 15:34 UTC
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web-development

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website-design

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registration

My company offers a bonus to every client that register. We would like to prevent people from abusing this by registering several times.

we thought about filtering clients by ip (there is a problem with workplaces where all stations have the same ip) cookies (if cookies are not allowed we might lose a client)

I would like your opinions on these two methods and will be glad to hear about new ones.

thanks

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