NATS4 track and strack - Tmmwiki
Same Surfer Hits Different Track Links?
If the same surfer hits more than one track link, also known as linkcode, NATS will use the tracking information for the most recent affiliate. For example:
A surfer passes through the tracking link for affiliate 1, and NATS creates a cookie and starts tracking for affiliate 1. If the same surfer then travels through a tracking link for affiliate 2, NATS begins tracking for affiliate 2, forgetting about affiliate 1.
The only exception to this is In-House affiliates. In-house affiliates will not override the old affiliate's NATSCode, so the old affiliate's code will be used. Continuing from the above example:
If affiliate 3 is an In-House affiliate and the surfer goes through the tracking link for affiliate 3, NATS will ignore tracking for this affiliate and will use the tracking information for affiliate 2.
In short if surfer follows YOUR link it will overwrite other cookie unless it is a inhouse cookie..