Forbrukeren sender reklamasjonen til selgeren.

Because in Norwegian, the definite article is usually attached to the end of the noun.

So:

• forbruker = consumer

• forbrukeren = the consumer

• reklamasjon = complaint / claim

• reklamasjonen = the complaint / claim

• selger = seller
• selgeren = the seller

This is one of the biggest differences from English: instead of putting the before the noun, Norwegian often adds a definite ending to the noun itself.

The dictionary, or indefinite singular, forms are:

• forbruker
• reklamasjon
• selger
• sende = to send

So the sentence is built from those base forms, with definite endings added to the nouns and the present-tense form used for the verb.

Because Norwegian usually expresses the by adding a suffix to the noun.

Compare:

• en selger = a seller

• selgeren = the seller

• en forbruker = a consumer
• forbrukeren = the consumer

This is normal Norwegian grammar, not an exception.

Sender is the present tense of sende.

• å sende = to send
• sender = sends / is sending

In Norwegian, the present tense often ends in -er.

So:

• jeg sender = I send / I am sending
• du sender = you send
• forbrukeren sender = the consumer sends

No. Norwegian verbs do not change for person in the present tense.

So you get:

• jeg sender
• du sender
• han sender
• vi sender

The form stays the same. That is much simpler than English.

Til means to, and here it marks the recipient.

So:

• sender reklamasjonen til selgeren = sends the complaint to the seller

A useful pattern is:

• å sende noe til noen = to send something to someone

Here:

• noe = reklamasjonen
• noen = selgeren

Mainly from word order.

Norwegian usually follows:

• Subject + Verb + Object

So in this sentence:

• Forbrukeren = subject
• sender = verb
• reklamasjonen = direct object
• til selgeren = prepositional phrase showing the recipient

Unlike some languages, Norwegian does not usually mark full nouns with special case endings to show subject and object. Word order does most of that work.

Because this is the normal neutral word order in a main clause:

• Subject + Verb + Object + other information

So this sentence is very standard and natural.

Other word orders are possible in Norwegian, but they usually add emphasis, sound more formal/literary, or depend on context. For a learner, this version is the safest basic pattern.

No. This is a very useful vocabulary point.

In Norwegian consumer/legal language, reklamasjon usually means a complaint, especially a formal complaint about a faulty product or service, or a notice that you are asserting your rights as a buyer.

So even if the English meaning has already been given to you, it is good to know that reklamasjon is a somewhat specialized word and not the same as everyday English advertisement.

Not exactly. In Bokmål, -en is the usual definite singular ending for many nouns that are treated as common gender in practice.

For this sentence, the important thing is simply:

• forbrukeren
• reklamasjonen
• selgeren

all mean the ... in singular form.

As a beginner, it is usually best to learn each noun together with its article:

• en forbruker
• en reklamasjon
• en selger

That will help you predict the definite form more easily.

Yes. Then you would normally use en before the nouns instead of the definite ending.

For example:

• En forbruker sender en reklamasjon til en selger.

That means:

• A consumer sends a complaint to a seller.

So the difference is:

• forbrukeren / reklamasjonen / selgeren = the consumer / the complaint / the seller
• en forbruker / en reklamasjon / en selger = a consumer / a complaint / a seller

Yes, it sounds somewhat formal or legal/administrative.

Words like:

• forbrukeren = the consumer
• selgeren = the seller
• reklamasjonen = the complaint/claim

are very common in official texts, consumer law, contracts, and instructions.

In everyday speech, people might choose more everyday words depending on the situation, but this sentence is perfectly natural in formal Norwegian.