Learn Hardcore German: Ihre Sendung ist unterwegs; die Zustellung erfolgt morgen früh. - Your shipment is on its way; delivery will take place tomorrow morning.

In this context it almost certainly means formal your (addressing the customer politely). Lowercase ihre can mean her or their, but here the capital letter fits the formal address convention. Note: because Ihre is at the start of the sentence, it would be capitalized anyway, so you normally confirm from context (e.g., elsewhere in the message you’d also see capitalized forms like Ihnen, Ihr).

Why is it Ihre Sendung and not Ihr Sendung?

Because Sendung is feminine singular. The possessive for the formal Sie agrees with the noun: nominative feminine singular is Ihre. Examples:

Ihr Paket (neuter)
Ihre Sendung (feminine)

What’s the nuance of Sendung compared to Paket or Lieferung?

Sendung = shipment/consignment in general (letters, parcels, freight); common in tracking.
Paket = a parcel/box specifically.
Lieferung = a delivery (often the goods delivered, or the process); broader and not limited to postal/courier items.

What’s going on grammatically in ist unterwegs?

unterwegs is an adverb/predicative adjective meaning “on the way/in transit.” The idiom is unterwegs sein. It doesn’t take endings and stays invariable. A near-synonym is auf dem Weg sein: Ihre Sendung ist auf dem Weg.

Is the semicolon necessary? Could I use a comma or a period?

Semicolon: fine and slightly formal; it separates two main clauses.
Comma: also acceptable in German between two main clauses without a conjunction.
Period: perfectly fine and often preferred for clarity. So all three work here stylistically: semicolon, comma, or period.

Why is erfolgt (present tense) used for a future action?

German frequently uses the present tense for scheduled or near-future events when a time expression is present. Die Zustellung erfolgt morgen früh is as natural as “The delivery happens tomorrow morning.” You could also say Die Zustellung wird morgen früh erfolgen, but that sounds more bureaucratic.

What exactly does erfolgt mean, and is it formal?

erfolgen means “to take place/occur/be carried out.” It’s neutral but leans formal/official. Friendlier alternatives:

Die Sendung wird morgen früh zugestellt.
Das Paket kommt morgen früh.

What’s the difference between Zustellung, Lieferung, Auslieferung, and Anlieferung?

Zustellung: final delivery to the recipient (postal/courier context).
Lieferung: delivery in general; also the delivered goods themselves.
Auslieferung: dispatch/distribution from a sender or warehouse.
Anlieferung: bringing goods to a receiving point/dock (often B2B).

Is morgen früh spelled and capitalized correctly? Can I write morgenfrüh or Morgen Früh?

Standard: morgen früh (lowercase früh).
Also accepted: morgenfrüh (less common).
Avoid: Morgen Früh with capital Früh (not standard). Remember: morgen is an adverb (lowercase) unless it starts the sentence. Der Morgen (the morning) is a noun and capitalized after an article: am Morgen.

Does morgen früh imply very early, or just any time in the morning?

It suggests early in the morning. For later morning, use morgen Vormittag. You might also see frühmorgens (“early in the morning”), which emphasizes the early part even more.

Can I move morgen früh to the front: Morgen früh erfolgt die Zustellung?

Yes. German allows you to front time expressions. Keep the verb in second position: Morgen früh erfolgt die Zustellung. You can also say: Morgen früh wird die Sendung zugestellt.

Is there a less formal, more conversational way to say this?

Examples:

Ihr Paket ist unterwegs. Es kommt morgen früh.
Informal singular: Dein Paket ist unterwegs. Wir liefern morgen früh.
Informal plural: Euer Paket ist unterwegs. Die Lieferung kommt morgen früh.

Why use the definite article in die Zustellung? Could I drop it?

The definite article signals the specific delivery of your shipment. In full sentences, die Zustellung is standard. Omitting the article (Zustellung erfolgt morgen früh) is possible in headline/notice style but feels telegraphic in regular prose.

Is unterwegs only for people, or can I use it for things like parcels?

You can use it for both. It’s common for parcels, vehicles, and people: Das Paket ist unterwegs. Der Techniker ist unterwegs.

Any quick pronunciation tips for key words?

Sendung: stress the first syllable (SEN-dung).
Zustellung: stress the first syllable (ZU-stel-lung); the st in Stellung sounds like “sht.”
unterwegs: stress the last syllable (unter-WEGS).