Ok, this one is a VERY BIG concept and NOT to be ignored or trifled with.
You will NOT find a discussion of ANY SORT in your company training or even in high-end upline distributor training (I'll wager)
That's because both companies and distributor organizations lean in the direction of RTO (Recruit To Opp - ie. THEIR OPP) as against a business model that embraces MOs (MULTIPLE OPPS). Unless you assume the mantle or challenge of a MO business model, you have zero need for SSI.
So what is it? No, sorry, in this instance, it is NOT some government handout (chuckling)!! SSI is short for Sponsor Structural Integrity. Ok, ok, yeah yeah another dang mouthful from that insane acronym-producing idiot who goes by Pawmarks! (ducking) - GUILTY as charged. If you re-read the above paragraph about multiple opps, you might just get a hint of what I'm driving at here. When you are involved in only ONE opp, there is no need to worry about the integrity of the "who belongs to whom" equation. It's all done for you, within the company's systems and database (scary thought, eh?) But move to a MULTIPLE BIZ OPP model, and that all falls apart. Now you have two or more 3rd party computers and databases and IT staffs who are tracking your organizational relationships. This can get REALLY UGLY if you have "cross-pollination" among them - ie. people that you or your org has recruited signing up for more than one of the opps you are involved in. You need some sanity in how this works. In a word (ok, acronym) you need SSI. The whole idea of SSI is that you, and you alone keep track of who sponsored whom. Nobody else is responsible for keeping that information straight. It is YOUR databases, YOUR scripts, YOUR systems that maintain the integrity (thus cementing your reputation as someone who believes in SSI in the first place) I know it sounds like a daunting task. It isn't. Scripts can do the work. Checks and balances can be engineered. Backups can automatically be performed (including OFFSITE backups) - heck, I've heard of people wearing a flash drive around their neck with their entire "organization" (including associates, suspects, leads, ezine lists, etc) - you could put these people on a slow boat to the orient and they would NOT have given up their most precious asset - their relationship lists - you'd have to WRENCH IT AWAY FROM AROUND THEIR NECK!! hehe
So what is this "integrity" part? Database integrity? Nope. It's simply paying attention to the ethical concept of "if Johnny sponsored Susie" in Opp No. 1 then Johnny better darn well be Susie's sponsor in Opp No. 2! That's it.
Of course, there are situations where Johnny might NOT be Susie's sponsor in opp no. 2 (eg. Johnny isn't involved in it yet) - but that's a conversation for another post and another day.