Conditions beyond als: indien, mits, tenzij and voor zover

Formal notices and contracts distinguish several kinds of condition. Indien presents a formal if-condition, mits states a requirement that must be met, and tenzij names an exception to what would otherwise apply.

Use indien for formal ‘if’, mits for ‘only if/provided that’, and tenzij for ‘unless/except if’. Use voor zover when the statement applies only within a stated limit.

1. Ask whether the clause merely gives a case in which something applies, imposes a requirement, names an exception, or limits the scope of the statement.
2. Choose the register. Als is the general neutral choice; indien and ingeval are formal, while mits and tenzij occur more in writing than in speech.
3. In a full clause, use subordinate-clause order and place the finite verb or verb group at the end.
4. In notices and conditions, recognise compact forms such as indien nodig, mits voldoende gefrankeerd, and tenzij anders vermeld.

Write ingeval as one word when it introduces a clause and can be replaced by als or indien. Before a noun phrase, use in geval van: in geval van brand (in case of fire).

Mits restricts a positive result to a requirement: De hond mag mee, mits hij aangelijnd is means that being on a lead is required. Tenzij starts from the result as the default and removes an exceptional case: De hond mag mee, tenzij het terrein gesloten is means that closure blocks the normal permission.

Do not treat mits and tenzij as interchangeable negatives. Their effect also depends on whether the main statement is positive or negative. When precision matters, test mits with ‘only if’ and tenzij with ‘except if’.

Formal Dutch often leaves out words that the reader can supply. These shortened conditions have no expressed subject and finite verb, but their full meanings remain recoverable.

These compact forms suit labels, rules, and terms and conditions. In ordinary conversation, a full clause with als is often clearer.

• Use indien or ingeval when you need to understand or produce formal administrative Dutch. In a message aimed at a broad audience, neutral als is usually clearer.
• Use mits when permission, validity, or a result depends on a requirement: De garantie blijft geldig, mits u het apparaat volgens de instructies gebruikt. (The warranty remains valid provided that you use the device according to the instructions.)
• Use tenzij when a rule applies by default except in the named situation: Het kantoor is geopend, tenzij een feestdag anders bepaalt. (The office is open unless a public holiday changes that.)
• Use voor zover to limit a claim, duty, or reimbursement to the relevant extent. It is not a decorative formal replacement for every als-clause.

• Do not translate mits as an ordinary open-ended ‘if’ when the sentence means ‘only if’. Missing that restriction can reverse an instruction.
• Do not read tenzij as mits: U hoeft niet te betalen, tenzij u extra bagage meeneemt means that extra baggage creates an exception to free travel.
• Do not use main-clause order after these subordinators: write indien u bezwaar wilt maken, not indien wilt u bezwaar maken. A conjunctionless verb-first condition is a separate construction.

Review subordinating conjunctions, ordinary conditional sentences, the difference between toen, als and wanneer, and verb-final subordinate-clause order. Conjunctionless conditions such as Mocht u vragen hebben, ... belong to verb-first conditional clauses.