You can't. Playing online with backups is just begging to be flagged b/c of the cert checking. The reason people get banned is b/c
1. They don't take the warnings seriously
2. Have no knowledge of CFW/Backups being detectable online
3. Don't care about getting banned
You want to play online without ban? buy the actual game without using CFW

 

Because Nintendo's bans are random and inconsistent. Many other SX users will simply tell you that they just dumped a certificate from one of their cartridges (or used games) and injected it into their backup. They think this is safe because they have not been banned yet. There is a big difference between not banned and safe. I think the 3DS scene is the only other living testament to that. To answer your earlier question, arguably the "safest" way would to be to dump the certificate from a copy of Splatoon 2 to go online with.

 

Sorry, I guess I should have explained simpler. Basically, to go online, your game needs something. We refer to it as a certificate. Cartridges all have them as well as eShop titles. The difference, for the Switch at least, is that one is tied solely to the cartridge while the other is generated after you get it from the eShop with a combination of console-specific stuff. This means you can never go online with an eShop dump until someone reverses this process. However, with cartridges, you can just grab one from another game and inject it into another if the latter does not have a certificate (which by the way all public dumps lack). This worked on the 3DS because Nintendo did not have a way to cross check certificates with the games they come from so as long as a certificate did not go online in more than one place simultaneously, you were good. For the Switch, Nintendo has now fully implemented a check which now flags your certificate, at the very least, and probably your console/account. Now they know which certificate got the flag, they can prevent that certificate from being able to go online no matter what game its injected in known as a certificate ban. And remember, while all if not most people have been flagged, bans may or may not be dished out immediately. After all, none of us work for Nintendo so we can only speculate on how they carry out this process.

Source: https://www.reddit.com/r/SwitchHacks/comments/8rxg26/psa_strong_antipiracy_measures_implemented_by/

 

I wonder if you use a backup with WIFI on, but DO NOT use the online features, if that will get you banned too

 

Like airplane mode sure. Tho I would just go full offline with them anyway since net connectivity is not needed unless you need to download homebrew apps

That seems like it can work, but the problem remains when that same certificate is being used on more than 1 console since you sold the cartridge . Until we find a way to spoof certificate checking like a bypass it is not safe to play backups online

 

Does bootting into SX OS leaves any trace while I'm not using it?
I mean, I would love to buy Splatoon 2 and play online while beeing able to boot into CFW when I'm not using an online dependable game
Using the same account would be a trace?

 

Still not banned

 

So just to be clear. At the moment there was a wave of LayeredFS users bans, but 0 sx os ban ?
Thanks for you'r time, i'm not an english native and sometimes its hard to understand with all theses specific vocabularies.

 

Hi, I searched a lot but still have some questions, if someone could answer me I'll be happy

I know theres a high chance of being banned if I use sx os, right. But if I got a ban, what exactly I wouldn't be able to do? Just play online and download eshop games? Could I still update the firmware and the games?

And another thing, I have a account that has a game, is it safe (I mean safe not safe from ban, but safe to "save the account") to play with that account online in the OFW until I get banned?

Will I be able to unlink that account and use it in another console without any problems or if I got banned with that account linked to my console will be stuck forever in it?

I need to know because I was planning playing that original digital game (MK8) until I got banned, but I didnt want to lose that game if I got a ban.

Thanks!

 

Banned: NO
Unchecked "Send Errors" in Menu: YES
SX OS Used offline: YES
SX OS used online: NO
Played with SX Backups online: NO
Layered FS Used offline: NO
Layered FS Used online: NO
Played with Layered FS Injects online: NO
Does the Eshop work: YES
Backups updated with what Firmware: OFW