Όχι μόνο χρειάζονται ημερομηνία έκδοσης αλλά ελέγχουν και τόπο κατοικίας.

This is the Greek pattern for not only ... but also ...

In your sentence:

• Όχι μόνο χρειάζονται ημερομηνία έκδοσης
• αλλά ελέγχουν και τόπο κατοικίας

it means something like:

• They not only need an issue date, but they also check place of residence.

A few useful notes:

• όχι μόνο = not only
• αλλά = but
• και = also / too

Greek often uses αλλά και together for the second half of this structure, but the και can appear a little later in the clause, as it does here.

Because Greek often leaves out subject pronouns when the verb ending already shows the person and number.

Here, both verbs are:

• χρειάζονται = they need
• ελέγχουν = they check

The endings tell you the subject is third person plural (they), so Greek does not need to say αυτοί unless it wants extra emphasis or contrast.

This is very common in Greek and is called pro-drop or subject omission.

Good question. Χρειάζονται comes from χρειάζομαι, which is a verb that has middle/passive-style endings but often an active meaning.

So:

• χρειάζομαι = I need
• χρειάζεσαι = you need
• χρειάζονται = they need

Even though the ending -ονται may remind you of passive forms, here it does not mean are needed. It means need.

This is something English speakers often have to get used to in Greek: some verbs look passive in form but are active in meaning.

Because έκδοσης is in the genitive, and Greek often uses this structure to mean of ...

So:

• ημερομηνία = date
• έκδοσης = of issue / of issuance

Together:

• ημερομηνία έκδοσης = date of issue

This is a very normal Greek noun + genitive pattern.

Using της is possible in some contexts, but here the article is omitted because the phrase is being used in a general, bureaucratic, or label-like way.

Because it depends on the noun ημερομηνία and tells you what kind of date it is.

Greek often uses the genitive where English uses of:

• ημερομηνία έκδοσης = date of issue
• τόπος κατοικίας = place of residence

So έκδοσης is genitive singular of έκδοση, and it functions like of issue.

Because τόπο is the accusative singular, and it is the direct object of ελέγχουν.

Compare:

• ο τόπος = the place (nominative, dictionary form)
• τον τόπο = the place (accusative)

Here the article is omitted, but the noun is still in the accusative:

• ελέγχουν τόπο κατοικίας = they check place of residence

So τόπο appears because it is the thing being checked.

Greek often omits the article in general, indefinite, or especially administrative / form-style language.

So phrases like:

• ημερομηνία έκδοσης
• τόπο κατοικίας

can sound like checklist items or required data fields, similar to English form language such as:

• date of issue
• place of residence

In a fuller, more everyday sentence, you might often see articles, depending on the exact meaning:

• χρειάζονται την ημερομηνία έκδοσης
• ελέγχουν τον τόπο κατοικίας

But without the articles, the sentence sounds more official or compressed.

For the same reason as έκδοσης: it modifies the noun before it and means of residence.

So:

• τόπο = place
• κατοικίας = of residence

Together:

• τόπο κατοικίας = place of residence

This noun + genitive structure is extremely common in Greek, especially in formal vocabulary.

Because Greek has some flexibility in where it places και, especially when it means also and is closely linked to the word or phrase being added.

Here:

• αλλά ελέγχουν και τόπο κατοικίας

literally feels like:

• but they also check place of residence

The και is placed right before the item being added, τόπο κατοικίας, which makes that phrase the focus of the also.

You may also see αλλά και together in other sentences, but this version is perfectly understandable and natural.

It sounds fairly formal, administrative, or bureaucratic, mainly because of:

• the omission of articles
• the noun phrases ημερομηνία έκδοσης and τόπο κατοικίας
• the compact structure

It sounds like something from instructions, a policy explanation, a website, or official requirements rather than casual conversation.

In everyday speech, a speaker might phrase the idea more fully, often with articles and a less compressed style.

Yes, in different contexts Greek forms like this can sometimes be ambiguous, but in this sentence the meaning is clearly they need.

Why?

Because the sentence continues with direct objects:

• ημερομηνία έκδοσης
• τόπο κατοικίας

So the structure is:

• they need X
• they check Y

If it meant are needed, the sentence would normally be built differently and the context would make that clear.

So here, you should read χρειάζονται as an active-meaning verb: they need.