Advertiser Postback generally look very similar, and they normally look like the following link:
The only difference between postback for different advertisers will be the digit at the end of the link. In the above case, "1048" refers to the Advertiser ID that you generate for a specific advertiser in your system.
The following screenshot shows how you can find an advertiser postback in the Offerslook system.
It's currently located at the Offer Details page of any offer