Exactly. For Germany, there is no additional protection, except the fact that they may not investigate further. But to be honest, the certificate might even look more suspicious, most people wouldn't even know such a thing exists.
You just tell them: "I have left Germany now, bye", I doubt they would even︀ ask where you have moved. And even if so, you could just tell them you'll︁ be traveling the world.
All they will care about is that you have really left.︂
If you send them a copy of your rental contract in Cyprus, it would probably︃ be enough for most tax inspectors. "Oh, ok, he is gone"
Basically that's all you︄ want.
But if they have doubts and they start investigating - say you are from︅ a small village and they ask your parent's neighbors how often you visit: "Oh, he︆ was just here for a month! And then another month a couple weeks ago!"
They could just say you still have habitual abode in Germany - so you are tax︇ resident under German rules.
If you can't convince them/a court otherwise, then your Cypriot tax︈ residency certificate would be worthless.
With Bulgaria or some other country without such a strange︉ rule, at least then you would have double tax residency and there would be one︊ more thing to protect you - even though Germany could still win. But it would︋ be much harder for them.
Exactly.
No idea.
Yes, of course, they can say you are tax resident in Germany.
Then it will be up for debate - I don't know how strict they are with the tie-breakers. If you have an apartment in Bulgaria, but you spend 360 days per year in hotels in Germany - would Bulgaria really︀ win that one? I doubt it.
You also have to remember that this can get︁ costly. You would likely need tax lawyers from both countries to defend against such a︂ case.
But I don't want to scare you too much either - I think you︃ should be fine either way. I doubt anyone will really investigate closer if you really︄ only spend 3 months maximum in Germany, you have long breaks between each visit, you︅ have a proper apartment in the other country etc.
But you should really be gone.︆ You shouldn't secretly be living with a family member or anything like that, then it︇ would really be tax fraud.
Maybe get another opinion from someone specializing in nomads. I︈ asked a German nomad friend and he mentioned
https://easydigitax.de - I haven't heard about them︉ before, so I can't say if they're good.
Ideally you'll want to get some more︊ information on how risky it is to spend 3 months in Germany, how long the︋ breaks in between should be etc.
This usually isn't written in the tax code but︌ there will be some case law.
It's actually really popular with nomads. You might like it.