Hey.
I'm looking to change my tracking platform. While doing it, there will be few weeks where I will be using 2 trackers with the same affiliate networks and traffic sources but not all of them are supporting 2 postback links.
Is there any solution for this? I'm sure i'm not the first one who face this issue hehe
Thanks.
Why do you need to use two trackers at the same time?
You could transfer your data from one tracker to another, then do the redirect at DNS level. It may take you a few hours, but that will be more simple than running several trackers in parallel.
You may need to manually add the few missing clics which were still sent to the old tracker into the new one.
Before starting any transfer, I recommend to decrease the TTL at your DNS level enough in advance, so that you do not have to wait 24/72 hours for the DNS server to update their cache.
You could just setup one of the trackers as a trafficsource in the other tracker and then pass the postback data to the other tracker.
Or just change the DNS and at the end of the day just update the subids manually at both trackers.
2 postbacks are often not even possible with the same affiliate network, you might have to create an additional account to handle this 
I would just take the "harder" route and switch everything to the new tracking platform... update campaign links at the traffic sources, shouldn't take that long unless you have 100s of campaigns running. It's a hassle for sure, but that's what I did too last time when I was switching trackers.
And the new tracker might even have an import function, many do so now, so it's not gonna be that much work after all 
I've solved this before by using Zapier - with the webhook zap catching your conversion postback and then firing both tracker postbacks in the chain. Obviously the only tracker that will register a conversion is the one that the click id matches. You could technically daisy chain both trackers and pass through both click ids but that doesn't sound like what your tying to do.
Without knowing which the trackers are it’s hard to comment, but most support a “traffic source postback” that you could use to replay it to the new tracker