Die Rückgabequittung steht im Bibliothekskonto.

Rückgabequittung is a compound noun:

• Rückgabe = return, giving something back
• Quittung = receipt

So Rückgabequittung means return receipt or receipt confirming a return.

German often combines nouns into one longer noun. The last part usually determines the basic meaning and the grammatical gender. Here, the last part is Quittung, so the whole word is feminine.

Die is the definite article for Rückgabequittung.

Because Quittung is feminine, the compound Rückgabequittung is also feminine, so in the nominative singular you get:

• die Rückgabequittung

In this sentence, it is the subject, so nominative is the correct case.

A learner might wonder this because die can also be a plural article. But here it is clearly singular because the verb is steht, which is singular:

• die Rückgabequittung steht = the return receipt stands/is listed
• If it were plural, you would expect stehen:
  • die Rückgabequittungen stehen

So the verb tells you it is singular.

Yes, stehen literally means to stand, but German also uses it in a wider sense than English.

In contexts involving text, information, records, or entries, stehen can mean things like:

• is written
• is listed
• appears
• is shown

So here, Die Rückgabequittung steht im Bibliothekskonto means something like:

• The return receipt appears in the library account
• The return receipt is listed in the library account

This is very natural in German.

Sometimes, but it changes the nuance.

• steht suggests the receipt is shown/listed/displayed there
• ist just says it is there

So:

• Die Rückgabequittung steht im Bibliothekskonto = the receipt appears/is listed in the account
• Die Rückgabequittung ist im Bibliothekskonto = the receipt is in the account

In a digital or administrative context, steht is often the more idiomatic choice.

im is a contraction of:

• in dem → im

Here, Bibliothekskonto is a location, so German uses in + dative:

• in dem Bibliothekskonto
• contracted: im Bibliothekskonto

So im is correct and very common.

German uses in with either the accusative or the dative, depending on meaning:

• accusative = movement into something
• dative = location inside something

Here there is no movement. The receipt is already in the account, so German uses the dative:

• im Bibliothekskonto = in the library account

Compare:

• Ich lege die Quittung in das Konto. = I put the receipt into the account.
  
  • movement → accusative
• Die Quittung steht im Konto. = The receipt is in the account.
  
  • location → dative

Bibliothekskonto is neuter because the final part is Konto, and Konto is neuter:

• das Konto

Since the last part determines the gender of a compound noun, you get:

• das Bibliothekskonto

That is why the dative form is dem Bibliothekskonto, and with contraction:

• in dem Bibliothekskonto → im Bibliothekskonto

It is another compound noun:

• Bibliothek = library
• Konto = account

So Bibliothekskonto means library account.

Notice the -s- in the middle: Bibliotheks-konto. This is called a linking element. It often appears in German compounds, though there is not always a simple rule for predicting it.

In German, all nouns are capitalized, not just proper names.

So in this sentence you get:

• Rückgabequittung
• Bibliothekskonto

This is a standard rule of German spelling.

This sentence follows the basic German main-clause pattern:

• Subject + verb + rest

So:

• Die Rückgabequittung = subject
• steht = finite verb
• im Bibliothekskonto = prepositional phrase

German main clauses usually put the finite verb in second position. Here the subject is first, so the verb comes right after it.

Yes, it is understandable and quite plausible, especially in an administrative or digital-library context.

That said, depending on the exact situation, a native speaker or an interface might also say things like:

• Die Rückgabequittung ist im Bibliothekskonto abrufbar.
• Die Rückgabequittung finden Sie im Bibliothekskonto.
• Die Rückgabequittung wird im Bibliothekskonto angezeigt.

Your sentence is fine, but steht gives it a slightly administrative or interface-style tone: the receipt is listed/shown there.

A rough English-friendly guide:

• Rückgabequittung ≈ RUEK-gah-buh-kvi-TOONG
• Bibliothekskonto ≈ bib-lee-oh-TAYKS-kon-toh

A few notes:

• ü in Rück- does not exist exactly in English; it is similar to saying ee with rounded lips.
• qu in German is usually pronounced kv
• ung at the end sounds like oong, not like the English word hung

Yes. This is a very common German pattern. For example:

• Das steht in der E-Mail. = That is written in the email.
• Die Adresse steht auf der Rechnung. = The address is on the bill.
• Im Vertrag steht, dass ... = The contract says that ...

So in your sentence, steht works the same way: the receipt is something that appears/is recorded in the account.