Generally they don’t want to give naturalization to people with more than one nationality. But if you are a full right citizen by an other rule, you could end up with more than that.
A small detail has to be noted, wether it has been recognized or not and claimed or not, a lot of rules give citizenship to people. The paperwork is about claiming it officially.
Got source? The vast majority of countries either a) insist you renounce all other citizenships on naturalization, whether it's one or three, or b) don't care how many you have.
Some will allow dual citizenship, but place conditions that make it difficult to get more than one. E.g., German citizenship law allows dual citizenship if:
> If a child born to German parents acquires another citizenship at birth (e.g., based on place of birth [birth in jus-soli countries mostly of the Americas], or descent from one parent [one German parent and one foreign parent]).
In theory somebody could have two or three nationalities under that law (two parents and place of birth) but no more.
Say one parent is German and the other is British, and the child was born in Brazil. If the kid is entitled to Israeli citizenship under the Law of Return, they get to keep all four.
You are late to the party, the latest trend is to strip citizenship from naturalized people we don’t like, it’s only possible if they retained one previous citizenship.
A small detail has to be noted, wether it has been recognized or not and claimed or not, a lot of rules give citizenship to people. The paperwork is about claiming it officially.