Das Servicecenter prüft Kontoverbindung und Fahrkartenkopie.

Yes. Das is the definite article for a neuter singular noun in the nominative case here, and Servicecenter is treated as neuter: das Servicecenter.

A few useful points:

• Servicecenter is the subject of the sentence.
• The subject is in the nominative case.
• Many loanwords ending in -center / -zentrum-like meanings are treated as neuter in German.

So:

• Das Servicecenter = the service center

Because the subject is third person singular: das Servicecenter = it / the service center.

The verb prüfen means to check / to examine. In the present tense:

• ich prüfe
• du prüfst
• er/sie/es prüft
• wir prüfen
• ihr prüft
• sie/Sie prüfen

Since das Servicecenter is singular, German uses:

• Das Servicecenter prüft ...

The sentence follows the normal German main-clause pattern:

Subject + verb + object(s)

So here you have:

• Das Servicecenter = subject
• prüft = verb
• Kontoverbindung und Fahrkartenkopie = direct objects

German main clauses require the finite verb to be in second position. Here, the subject comes first, so the verb comes right after it.

They are in the accusative case, because they are the things being checked.

The verb prüfen normally takes a direct object, and direct objects are usually in the accusative:

• Das Servicecenter prüft die Kontoverbindung.
• Das Servicecenter prüft die Fahrkartenkopie.

In your sentence, both nouns are direct objects joined by und.

A detail that can confuse learners: you do not see a special accusative ending on the nouns themselves here. That is normal. In German, many nouns do not change form in the accusative.

This is probably the most noticeable feature of the sentence.

In full, everyday German, many speakers would more naturally say:

• Das Servicecenter prüft die Kontoverbindung und die Fahrkartenkopie.

The version without articles sounds terse, official, bureaucratic, or list-like. This kind of article omission is common in:

• forms
• administrative language
• brief written notices
• checklist-style phrasing

So the sentence is understandable, but it feels a bit like official shorthand rather than relaxed everyday speech.

As a learner, if you want to sound safe and natural, it is often better to include the articles unless you have a reason not to.

Because German loves compound nouns: several words are joined into one.

Here:

• Kontoverbindung = Konto
  • Verbindung
    • roughly: bank account details / account connection
• Fahrkartenkopie = Fahrkarte
  • Kopie
    • copy of a ticket

A very useful rule:

In a German compound noun, the last part determines the gender and the basic meaning category.

So:

• die Verbindung → die Kontoverbindung
• die Kopie → die Fahrkartenkopie

That is why both of these nouns are feminine.

Because in German, all nouns are capitalized.

So in this sentence:

• das Servicecenter
• die Kontoverbindung
• die Fahrkartenkopie

This is one of the most consistent spelling rules in German, and it helps you spot nouns quickly when reading.

Yes. That is completely normal.

Here, und joins two things that are both being checked:

• Kontoverbindung
• Fahrkartenkopie

So the structure is basically:

• The service center checks X and Y.

Both nouns depend on the same verb prüft.

It is understandable and plausible, especially in an administrative or institutional context, but it sounds somewhat compressed.

A more natural full-sentence version would often be:

• Das Servicecenter prüft die Kontoverbindung und die Fahrkartenkopie.

Depending on context, a native speaker might also say something even more specific, for example:

• Das Servicecenter prüft Ihre Kontoverbindung und eine Kopie der Fahrkarte.

So the original sentence is not wrong, but it has a slightly official / form-like style.

Two things show that:

1. das is singular here
2. prüft is the singular verb form

If it were plural, you would expect:

• Die Servicecenter prüfen Kontoverbindung und Fahrkartenkopie.

So in your sentence, it clearly means one service center.

Yes, both are feminine:

• die Kontoverbindung
• die Fahrkartenkopie

But in the original sentence, that gender is not visible because the articles are omitted.

If you wrote the fuller version, you would see it:

• die Kontoverbindung
• die Fahrkartenkopie

Their gender matters for:

• articles
• pronouns
• adjective endings

For example:

• Die Kontoverbindung ist korrekt. Sie wurde geprüft.
• Die Fahrkartenkopie ist lesbar. Sie wurde ebenfalls geprüft.