L'embalatge té el comprovant de compra.

Because el is shortened to l' before a vowel sound.

• el + embalatge → l'embalatge
• This is called apostrophation
• It works much like French l'

So l'embalatge still means the packaging, and embalatge is still a masculine singular noun.

It is masculine: el / l'embalatge.

That is why the sentence uses:

• l'embalatge = the packaging
• el comprovant = the receipt / proof of purchase

The ending -atge often appears in masculine nouns in Catalan, though you should not rely on endings alone every time.

Té is the 3rd person singular form of the verb tenir, which means to have.

So:

• tenir = to have
• té = he/she/it has

In this sentence, l'embalatge té... means the packaging has...

In English, we might also naturally say contains, so here té can feel like has / contains.

The accent in té is important.

• té = has
• te = you (object pronoun, like you in I see you) or tea in some contexts depending on the variety and spelling conventions

So the accent helps distinguish meanings and also shows the stressed pronunciation.

Comprovant de compra means proof of purchase.

Word by word:

• comprovant = proof, voucher, receipt-like document
• de compra = of purchase

Depending on context, it may be translated as:

• proof of purchase
• receipt

But proof of purchase is often the safest meaning, because comprovant is slightly broader than just one specific kind of receipt.

Catalan often uses de + noun where English might use a noun as an adjective.

So:

• comprovant de compra = literally proof/receipt of purchase
• natural English: proof of purchase

This structure is very common in Catalan:

• carnet de conduir = driving licence
• centre de salut = health centre
• targeta de crèdit = credit card

Because comprovant is a specific noun phrase here: the proof of purchase.

So:

• el comprovant de compra = the proof of purchase

Catalan often uses the definite article in places where English may or may not use the, but in this sentence it matches English quite well.

Yes, that is the basic idea.

Catalan uses tenir very naturally not only for possession, but also for something like containing or including.

So l'embalatge té el comprovant de compra can be understood as:

• the packaging has the proof of purchase
• the packaging contains the proof of purchase
• the proof of purchase is with/in the packaging

A simple approximate pronunciation is:

lem-buh-LAHT-juh TEH ul kum-pruh-VAN deh KOM-pruh

A few notes:

• l'embalatge begins smoothly because of the apostrophe: l'emb...
• tg in embalatge sounds like the sound in judge or garage depending on accent
• té is stressed
• comprovant is stressed on the last syllable: comproVANT

Pronunciation varies somewhat across Catalan-speaking regions.

Yes. Depending on context, you might also hear:

• rebut = receipt
• tiquet = ticket/receipt
• justificant de compra = proof of purchase

But comprovant de compra is a good general phrase for proof of purchase.

No. This is a very normal Catalan sentence pattern:

• Subject + verb + object
• L'embalatge
  • té
    • el comprovant de compra

So it follows a very familiar structure for an English speaker:

• The packaging
  • has
    • the proof of purchase

If you know the words, the grammar of this sentence is quite straightforward.