Where possible you should notify Optimise of the Channel to which Sale/Transaction is attributed. This can be achieved by adding &Channel= to your Sale Tag, for example:

<script type="text/javascript" src="https://track.omguk.com/4301/transaction.asp?APPID={SaleReference}&MID={MID}&PID={MID}&status={SaleValue}&VCode={VoucherCode}&Channel={Channel}"></script> 
<noscript><img src="https://track.omguk.com/apptag.asp?APPID={SaleReference}&MID=4301&PID=4406&status={SaleValue}&VCode={VoucherCode}&Channel={Channel}" border="0" height="1" width="1"></noscript>

You should always pass &Channel=Optimise when a sale is attributed to an Optimise Affiliate.

We recommend using the following values in the Channel Parameter:

Value When to use
Optimise  When sale attributed to Optimise
PPC-Generic  When sale attributed to PPC Generic activity
PPC-Brand  When sale attributed to PPC Brand activity
Display  When sale attributed to Display activity
Non-Optimise-Aff  When sale attributed to Non Optimise Affiliate activity
Other  When sale attributed to any other channel