Tady se musíte podepsat.

Musíte is the 2nd person plural form of muset (to have to / must).

It can be used for:

• you all must
• you must when speaking politely to one person

So in a real situation, this sentence is often said to one person formally, for example by a clerk, receptionist, or official.

Because the verb here is podepsat se, which means to sign oneself / to sign one’s name.

In Czech, this is very natural when you mean that someone should write their signature.

Compare:

• podepsat smlouvu = to sign a contract
• podepsat se = to sign one’s name

So se is not optional here if you mean sign your name.

Podepsat is the infinitive form of the verb.

After muset (must / have to), Czech normally uses an infinitive:

• musím jít = I must go
• musíte podepsat = you must sign

So the structure is:

musíte + infinitive

This is about aspect, which is very important in Czech.

• podepsat = perfective
  one complete act of signing
• podepisovat = imperfective
  signing in progress, repeated signing, or focusing on the process

In this sentence, the speaker means one completed action: you need to sign here, once.
That is why podepsat is the natural choice.

Because se is a clitic, and Czech clitics usually go in the second position in the sentence or clause.

Here the first element is Tady, so se comes next:

• Tady se musíte podepsat.

This word order is very normal in Czech.

A learner might want to say:

• Tady musíte se podepsat.

But that sounds unnatural, because se usually does not go there.

Yes. Czech word order is flexible, but the emphasis changes.

For example:

• Tady se musíte podepsat. = emphasis on here
• Musíte se podepsat tady. = also possible, still natural
• Podepsat se musíte tady. = stronger, marked emphasis

The version with Tady first is especially natural when someone is pointing to a specific spot on a form.

Tady means here.

It is very common in everyday Czech.
You could also hear:

• zde = here, but more formal or written
• tu = here, shorter and common in speech in some contexts

So:

• Tady se musíte podepsat. = normal spoken Czech
• Zde se musíte podepsat. = more formal

On official forms, zde is common in writing, but in speech tady is very natural.

Yes, absolutely.

• Tady se musíte podepsat. = You must sign here.
• Podepište se tady. = Sign here.

The second one uses the imperative (Podepište), so it is a direct instruction.
The first one sounds a bit more like stating a requirement or procedure.

Both are common.

No, nothing is missing.

When Czech uses podepsat se, the meaning is simply to sign one’s name.
You do not need to add an object.

If you want to mention the thing being signed, you would usually use podepsat without se:

• Musíte podepsat smlouvu. = You must sign the contract.
• Musíte se podepsat tady. = You must sign here.

So the sentence is complete as it is.

Not always.

In real-life Czech, musíte can mean:

• must
• have to
• need to

So in many situations, Tady se musíte podepsat sounds like a normal practical instruction, not necessarily a harsh command.

English must can sometimes sound stronger than the Czech original, depending on context.

A rough pronunciation guide is:

TAH-dih seh MOO-see-teh POH-dep-saht

A few helpful points:

• Czech stress is usually on the first syllable of each word.
• í in musíte is a long vowel.
• y in tady is not exactly like English ee, but TAH-dih is a decent approximation.
• ch is not in this sentence, so pronunciation is fairly straightforward.

Here are the dictionary forms:

• tady = here
• se = reflexive particle / clitic
• musíte ← muset = to have to, must
• podepsat = to sign
• full reflexive expression: podepsat se = to sign one’s name

This is useful because in Czech you often need to learn some verbs together with se or si, not just by themselves.