Το τέλος ενεργοποίησης πληρώνεται από τον συνδρομητή.

Yes, τέλος can mean end, but it also very commonly means fee or charge in formal or business contexts.

So in this sentence:

Το τέλος ενεργοποίησης = the activation fee

This is a very common word in bills, contracts, mobile plans, websites, and customer-service language.

Examples:

• τέλος σύνδεσης = connection fee
• τέλη κυκλοφορίας = road tax / vehicle tax
• χωρίς επιπλέον τέλος = without an extra charge

The exact meaning depends on context.

Ενεργοποίησης means of activation.

It is the genitive singular of ενεργοποίηση (activation).

So:

• ενεργοποίηση = activation
• ενεργοποίησης = of activation

Greek often uses this structure where English uses a noun before another noun:

• activation fee in English
• literally fee of activation in Greek

So:

το τέλος ενεργοποίησης = the activation fee

Because Greek commonly links two nouns by putting the second one in the genitive to show relationship.

Here, the relationship is:

• a fee related to activation

So:

• τέλος = fee
• ενεργοποίησης = of activation

This is a very common pattern in Greek:

• κέντρο πόλης = city center
• τιμή προσφοράς = offer price
• αριθμός τηλεφώνου = telephone number

So the genitive here is not strange or special; it is a standard way to build noun phrases.

Because Greek often leaves out the article in this kind of noun phrase when it functions like a label or category.

So:

το τέλος ενεργοποίησης = the activation fee

This sounds natural and standard.

If you said:

το τέλος της ενεργοποίησης

that would mean something more like the fee of the activation or the fee for the specific activation, with a more definite, specific feeling.

In many practical contexts, Greek prefers the shorter article-less genitive phrase.

Because the sentence is in the passive voice.

• πληρώνει = pays (active)
• πληρώνεται = is paid / gets paid (passive)

Compare:

• Ο συνδρομητής πληρώνει το τέλος. = The subscriber pays the fee.
• Το τέλος πληρώνεται από τον συνδρομητή. = The fee is paid by the subscriber.

So πληρώνεται matches the English idea is paid.

It is present tense, passive voice, third person singular.

Here it usually has a general or rule-like meaning, not necessarily something happening right now at this exact second.

So in context it means something like:

• is paid
• must be paid
• is payable

This kind of present tense is very common in instructions, policies, and official wording.

In a passive sentence, Greek often uses από to introduce the person who performs the action, just like by in English.

So:

• πληρώνεται από τον συνδρομητή = is paid by the subscriber

Here:

• από = by
• τον συνδρομητή = the subscriber

This is the agent of the passive verb: the one who does the paying.

Because after από, Greek uses the accusative case.

So:

• ο συνδρομητής = the subscriber (subject form / nominative)
• τον συνδρομητή = the subscriber (accusative form)

Since από requires the accusative, you get:

από τον συνδρομητή

This happens with many Greek prepositions.

You know it from both meaning and verb agreement.

The verb is πληρώνεται, which is third person singular, and το τέλος is singular, so it fits as the subject.

Also, in a passive sentence, the thing receiving the action becomes the subject:

• active: Ο συνδρομητής πληρώνει το τέλος.
• passive: Το τέλος πληρώνεται από τον συνδρομητή.

So even though English learners may first notice τον συνδρομητή, the grammatical subject is το τέλος.

Yes. Greek word order is more flexible than English.

The sentence could also appear as:

• Το τέλος ενεργοποίησης πληρώνεται από τον συνδρομητή.
• Από τον συνδρομητή πληρώνεται το τέλος ενεργοποίησης.
• Πληρώνεται από τον συνδρομητή το τέλος ενεργοποίησης.

These all mean basically the same thing, but the emphasis changes slightly.

The version you were given is very natural and neutral for formal written Greek.

Yes, it sounds formal, administrative, or commercial.

You would expect this kind of wording in:

• contracts
• telecom offers
• billing information
• terms and conditions
• customer-service notices

In everyday speech, someone might be a little more direct and say something like:

Ο συνδρομητής πληρώνει το τέλος ενεργοποίησης.

That is more straightforward and active: The subscriber pays the activation fee.

The passive version sounds more official.

The stress is on ρώ:

πλη-ΡΩ-νε-ται

A rough pronunciation guide: plee-RO-ne-te

And the full sentence is approximately:

To TE-los e-ner-go-POI-i-sis pli-RO-ne-te a-PO ton sin-dro-mi-TI

A few stress points:

• τέλος
• ενεργοποίησης
• πληρώνεται
• από
• συνδρομητή

Paying attention to written accent marks in Greek is very helpful, because they show you where the stress goes.