great tips.  thanks guys.

After thinking more about IPN, I think it could work for the site.  I could
lock the items for ten-fifteen minutes.

I would have to check to see if I should unlock items every minute or so.
 Our host only lets you run scheduled tasks every hour at the most.

I was thinking about running the unlocking check in Application.cfm, which
would run it instantly pretty much.  I would have to keep the first query
quick for performance, nest the other required steps in a cfif based upon
the first query recordcount.  Definitely use a stored procedure for
performance.

Of course, the other issue is handling a paypal purchase that is completed
after the lockout has expired.  At that point, we have charged the customer,
and the item may have been sold to someone else.  I would have to verify the
items from the order are still available.

Is it possible to automatically refund a purchase via ipn?  I could do that
and send the customer an email telling them the order they placed is void.

Any thoughts?


On Mon, Mar 8, 2010 at 12:30 PM, Justin Scott
<[email protected]>wrote:

>
> > What would be the best way to establish/build trust?
>
> If you're taking credit cards directly you should be getting a regular
> security scan of your web site through an authorized vulnerability scanning
> service such as McAfee Secure or Security Metrics.  These services usually
> offer a "secure logo" which shows that your site has passed their security
> scan which can help with customer confidence as well.
>
>
> -Justin
>
>
>
> 

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