Fermo restando che la riservatezza resta valida, firmiamo.

It is a formal, set expression meaning something like:

• provided that
• it being understood that
• without prejudice to the fact that
• on the understanding that

In this sentence, it introduces a condition or reservation before the main action:

• Fermo restando che la riservatezza resta valida, firmiamo.
• Provided that confidentiality remains in force, let’s sign / we sign.

This phrase is especially common in legal, administrative, and business Italian.

In fermo restando, fermo is part of a fixed idiomatic expression. It does not directly agree with la riservatezza in the way an ordinary adjective would.

Historically and grammatically, the expression comes from a more impersonal structure, roughly like with it remaining established/fixed that... Over time, it became a standard legal-bureaucratic phrase.

So for learners, the safest approach is:

• learn fermo restando che as a chunk
• do not try to interpret fermo as a normal adjective attached to riservatezza

You may also see related forms in other constructions, such as ferma restando la necessità di..., where agreement can appear more transparently, but in your sentence fermo restando che is best treated as a fixed formula.

Good question. They do different jobs:

• restando = the gerund (remaining)
• resta = present indicative, 3rd person singular (remains)

So the sentence contains:

1. Fermo restando che...
   a fixed expression using the gerund

2. la riservatezza resta valida
   a normal clause meaning confidentiality remains valid / in force

So even though both come from restare, they are not redundant in grammatical function:

• restando helps build the introductory formula
• resta is the actual verb of the subordinate clause

Not exactly. La riservatezza can mean:

• confidentiality
• discretion
• secrecy/privacy, depending on context

In a business or legal sentence like this one, riservatezza most naturally means confidentiality.

So here it refers to the continuing validity of a confidentiality obligation, confidentiality clause, or duty not to disclose information.

Valida is an adjective meaning valid or still in force.

It is feminine singular because it agrees with la riservatezza, which is feminine singular:

• la riservatezza → feminine singular
• therefore valida → feminine singular

So:

• la riservatezza resta valida
• confidentiality remains valid / remains in force

In English, valid does not change form, but in Italian adjectives usually agree in gender and number with the noun they describe.

Because the clause is presented as a factual or accepted condition, not as doubt, opinion, emotion, or uncertainty.

• che la riservatezza resta valida = that confidentiality remains valid

This is treated as a statement of fact or a stated condition, so the indicative is natural.

Italian uses the subjunctive after che only in certain environments, such as doubt, desire, emotion, uncertainty, or some impersonal expressions. None of those are strongly present here.

So:

• resta = normal and expected
• a subjunctive here would sound unusual in standard usage

It can be interpreted either way depending on context, because the 1st person plural present in Italian can function as:

• we sign
• let’s sign

In a sentence like this, especially in business or negotiation context, firmiamo often feels like:

• let’s sign
• we can sign
• we sign

If the sentence is part of a document or formal exchange, the exact English rendering depends on the situation. But grammatically, Italian allows this ambiguity.

It is definitely formal, especially because of Fermo restando che.

A native speaker would likely use it in:

• contracts
• emails with legal/business tone
• formal negotiations
• administrative writing

In everyday conversation, people would usually say something simpler, for example:

• Se la riservatezza resta valida, firmiamo.
• Purché la riservatezza resti valida, firmiamo.

Those are much more natural in ordinary speech.

Yes. Restare and rimanere can both mean to remain in many contexts.

So this would also work:

• Fermo restando che la riservatezza rimane valida, firmiamo.

That said, resta valida is slightly more compact and often feels very natural in formal written Italian. Both are correct.

Italian often places a condition, limitation, or legal reservation first, especially in formal language.

So the structure is:

• condition/reservation first: Fermo restando che la riservatezza resta valida
• main action second: firmiamo

This word order helps highlight that the signing is not unconditional. The speaker is making the signature dependent on the confidentiality clause still applying.

In English, we often do something similar:

• Provided that confidentiality remains in force, let’s sign.

They are similar, but not identical in tone.

• fermo restando che = very formal, often legal, meaning it being understood that / without prejudice to the fact that / provided that
• a condizione che = more directly on condition that

Also, a condizione che usually takes the subjunctive:

• A condizione che la riservatezza resti valida, firmiamo.

That version is fully correct, but it sounds less like legal boilerplate and more like a straightforward condition.

So the difference is mostly one of register and style:

• fermo restando che = formal/legal formula
• a condizione che = standard conditional expression

Not very naturally.

A very literal breakdown would be something like:

• Fermo = fixed / established
• restando = remaining
• che = that
• la riservatezza = confidentiality
• resta = remains
• valida = valid
• firmiamo = we sign / let’s sign

But a word-for-word translation sounds awkward in English. The natural approach is to translate the expression idiomatically, for example:

• Provided that confidentiality remains in force, let’s sign.
• It being understood that confidentiality remains valid, we sign.

So this is a good example of a sentence where understanding the expression as a whole is more useful than translating each word separately.