Behold bagagemærket, i tilfælde af at kufferten ikke kommer.

No. In this sentence, Behold is the imperative form of beholde, which means keep, hold on to, or retain.

So Behold bagagemærket means Keep the baggage tag.

This is a classic false friend for English speakers, because English behold means look at or see, but Danish behold does not mean that.

Danish very often forms compound nouns by writing them as a single word.

So:

• bagage = baggage
• mærke = label, tag

Together:

• bagagemærke = baggage tag

Then the ending -et makes it definite:

• bagagemærke = a baggage tag
• bagagemærket = the baggage tag

This is very normal in Danish. English often uses two words where Danish uses one.

That -et is the definite article attached to the noun.

In Danish, the definite article is often added to the end of the noun instead of being a separate word like the in English.

For example:

• et mærke = a tag / a label
• mærket = the tag / the label

Since bagagemærke is a neuter noun, its definite singular form is bagagemærket.

So the sentence uses the baggage tag, not a baggage tag.

For the same reason: -en marks the definite form.

• en kuffert = a suitcase
• kufferten = the suitcase

So kufferten ikke kommer means the suitcase does not arrive / does not come.

The noun kuffert is a common-gender noun, so its definite ending is -en.

I tilfælde af at means in case or in the event that.

It is a fairly formal or standard expression. Word by word, it is roughly:

• i = in
• tilfælde = case
• af at = of that / that

So the whole expression functions like English in case.

A simpler alternative in many everyday situations is hvis (if), but i tilfælde af at sounds a bit more like official instructions, which fits an airport context well.

Yes. In Danish, komme is often used where English would say arrive, show up, or sometimes come through.

So:

• kufferten kommer ikke literally = the suitcase doesn't come
• natural English meaning = the suitcase doesn't arrive

This is normal Danish usage. Danish often uses komme in situations where English prefers a more specific verb.

In airport language, you might also hear:

• Kufferten kommer ikke frem = the suitcase does not arrive / does not make it through

That is a bit more explicit, but kommer alone is understandable.

Because this part is a subordinate clause after at.

In main clauses, Danish usually has the finite verb in second position:

• Kufferten kommer ikke. = The suitcase is not arriving.

But in subordinate clauses, Danish typically puts adverbs like ikke before the finite verb:

• ... at kufferten ikke kommer = ... that the suitcase does not arrive

So this is standard subordinate-clause word order.

A very useful pattern is:

• main clause: Han kommer ikke
• subordinate clause: ... at han ikke kommer

That same pattern appears here.

Yes, in standard Danish punctuation, a comma is normally placed before a subordinate clause.

So:

• Behold bagagemærket, i tilfælde af at kufferten ikke kommer.

That comma marks the start of the subordinate clause introduced by i tilfælde af at.

Danish comma rules can vary a little depending on whether someone follows traditional or newer comma practice, but in a sentence like this, the comma is very normal and expected.

Yes, it is understandable and fairly natural, especially in an instructional or formal context such as travel or airline information.

It has the tone of a practical instruction:

• Keep the baggage tag, in case the suitcase doesn't arrive.

A speaker might also say something slightly different in everyday language, such as:

• Behold bagagemærket, hvis kufferten ikke kommer.
• Behold bagagemærket, hvis kufferten ikke dukker op.
• Behold bagagemærket, hvis kufferten ikke kommer frem.

But the original sentence is absolutely reasonable.

The imperative in Danish is usually the verb stem.

For beholde:

• infinitive: beholde = to keep
• imperative: behold = keep

This is very common:

• at komme → kom! = come!
• at vente → vent! = wait!
• at beholde → behold! = keep!

So Behold bagagemærket is a direct instruction.

Yes, often it could.

For example:

• Behold bagagemærket, hvis kufferten ikke kommer.

That would also mean Keep the baggage tag if the suitcase doesn’t arrive.

The difference is mostly one of tone:

• hvis = simpler, more everyday
• i tilfælde af at = a bit more formal, like written instructions or official advice

So both work, but the original sounds slightly more like standard travel guidance.