Erstatningskravet viser kjøpsdatoen.

Because Norwegian normally writes compound nouns as one word.

• erstatningskrav = erstatning
  • krav
• kjøpsdato = kjøp
  • dato

This is much more common in Norwegian than in English. Where English often uses separate words like purchase date, Norwegian usually makes one compound noun: kjøpsdato.

The ending -et marks the noun as definite singular: the compensation claim.

The base noun is:

• et erstatningskrav = a compensation claim
• erstatningskravet = the compensation claim

The reason it takes -et is that the main noun in the compound is krav, and krav is a neuter noun:

• et krav
• kravet

In Norwegian compounds, the last element is the main one, and it decides gender and inflection.

Because the main noun here is dato, which is usually a masculine noun in Bokmål:

• en dato
• datoen

So:

• en kjøpsdato = a purchase date
• kjøpsdatoen = the purchase date

Again, in a compound noun, the last part decides the gender and the definite ending.

That -s is a linking s used in many Norwegian compounds.

So:

• kjøp = purchase
• kjøpsdato = purchase date

You can think of it as similar to an English idea like purchase-date, but in Norwegian it becomes one word, and the s helps connect the parts.

You also see this in many other compounds, for example:

• arbeidsdag = workday
• fødselsdato = date of birth / birth date

The s is very common, but it is not added in every compound, so it has to be learned word by word.

Because Norwegian usually expresses the by adding a definite ending to the noun itself.

So instead of a separate article, you get:

• kravet = the claim
• datoen = the date

That is why the sentence does not need separate words like the before those nouns.

A separate determiner can appear when there is an adjective, for example:

• den nye kjøpsdatoen = the new purchase date

But in your sentence, the noun stands alone, so the ending is enough.

Viser is the present tense of å vise.

• å vise = to show
• viser = show / shows

Norwegian verbs do not change for person:

• jeg viser
• du viser
• han/hun viser
• vi viser

So viser works for all subjects in the present tense.

The structure is:

Subject + Verb + Object

• Erstatningskravet = subject
• viser = verb
• kjøpsdatoen = object

So the sentence is a very standard main clause.

This is similar to English word order in this case:

• The compensation claim / shows / the purchase date

Yes, in practice, that is the rule you should follow.

For example:

• et krav → et erstatningskrav → erstatningskravet
• en dato → en kjøpsdato → kjøpsdatoen

So when you meet a long compound noun, look at the final noun. That usually tells you the gender and how the word will inflect.

Yes. Å vise is a flexible verb.

Depending on context, viser can mean:

• shows
• displays
• indicates

So in an administrative or technical context, this sentence might mean that the claim form, system, or document shows/displays the purchase date.

To make it negative, add ikke after the verb:

• Erstatningskravet viser ikke kjøpsdatoen.
• The compensation claim does not show the purchase date.

To make it a yes/no question, put the verb first:

• Viser erstatningskravet kjøpsdatoen?
• Does the compensation claim show the purchase date?

Those are very common Norwegian patterns:

• statement: Subject + verb
• question: Verb + subject
• negative statement: Subject + verb + ikke