How can I make a AW Conversion Tracking only *one* per customer?

[#1]

I am getting overreporting of sales from our Adwords account.

We sell two "types" of things:

1. Software for purchase

2. Software by subscription

for the Subscription, all of the sales are recorded in one database.  I have had Awords report more sales than the Susbscription Data base for the same period.  I'm thinking maybe we're getting multiple "pageviews" for the same sale.

Here is the conversion code:

<!-- Google Code for SubscriptionPurchased Conversion Page -->
<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = <my code>;
var google_conversion_language = "en";
var google_conversion_format = "1";
var google_conversion_color = "ffffff";
var google_conversion_label = "mt_LCPr-_AIQg9___gM";
var google_conversion_value = 200;
/* ]]> */
</script>
<script type="text/javascript" src="http://www.googleadservices.com/pagead/conversion.js">
</script>
<noscript>
<div style="display:inline;">
<img height="1" width="1" style="border-style:none;" alt="" src="http://www.googleadservices.com/pagead/conversion/1071640451/?value=200&amp;label=mt_LCPr-_AIQg9___g..."/>
</div>
</noscript>

[#2]

"I'm thinking maybe we're getting multiple "pageviews" for the same sale."

Why do you think so?

Have you done a test-purchase / subscription too see which conv. code apperas in the source code on the thank you-page?

[#3]

Hi MrAnalogy,

I asked the Google engineers this question not too long ago. It is their opinion that addional conversions are not recorded when a user returns to a cached thank you page. If the user were to refresh the page, the conversion would record. I would add a no-cache header to the page to prevent it from displaying again.

Best of Luck

Pete

[#4]

You may have missed the part above where I said:

"I have had Awords report more sales than the Susbscription Data base for the same period."

[#5]

So, are you thinking that two different sales might somehow be using the same cached "thank you page" that has the conversion script on it?

And that Adwords would then count this as only a single sale instead of two sales? (so it would miss some sales)?

And that those two sales "visits" might be from two different people or from the same person?

(We may be having that problem, although the problem I know about is that we have OVEREPORTING of sales (i.e., in month X we had $1200 in sales reported by Adwords but I KNOW we only had $400 in sales.

Is it possible that if someone visited the same page twice that adwords would doublecount ? (count each visit (or a page refresh) as a sale?

[#6]

Hi,

I hate to jump in here so late but this thread discovered some possibilities for why there could be such discrepancies.

Maybe there is something in here that can help you:  https://www.en.adwords-community.com/t5/Measure-results/AdWords-Total-Conv-Value-shows-double-the-ac...

-Tommy

[#7]

Hi MrAnalogy,

"Is it possible that if someone visited the same page twice that adwords would doublecount ? (count each visit (or a page refresh) as a sale?"

Only if the page is refreshed.

Are you maybe tracking Analytics goals as a conversion with a fixed value.?

Pete