Mam pełnomocnictwo właściciela.

Mam means I have. It is the 1st person singular present tense of the verb mieć (to have).

• mieć = to have
• mam = I have

So the sentence begins with Mam... = I have...

In Polish, subject pronouns are often omitted because the verb ending already shows who is doing the action.

• mam already clearly means I have
• so ja is unnecessary unless you want emphasis or contrast

For example:

• Mam pełnomocnictwo właściciela. = neutral
• Ja mam pełnomocnictwo właściciela. = I have the owner's authorization (maybe not someone else)

Pełnomocnictwo is a formal/legal word. It usually means:

• power of attorney
• authorization to act on someone’s behalf
• sometimes more generally written authorization

It is more formal and more legal-sounding than many everyday expressions.

Grammatically, pełnomocnictwo is:

• a neuter noun
• singular
• dictionary form: pełnomocnictwo

Because after mam, the noun is the direct object, so it goes into the accusative case. But for many neuter singular nouns, the accusative has the same form as the nominative.

So:

• nominative: pełnomocnictwo
• accusative: pełnomocnictwo

That is why you do not see a change.

Because właściciela is the genitive singular form of właściciel (owner).

Here, Polish uses the genitive to show a relationship like:

• the owner’s authorization
• authorization of the owner
• authorization from the owner

So:

• dictionary form: właściciel
• genitive singular: właściciela

This is very common in Polish with nouns linked to another noun.

Yes. Właściciel is a masculine noun, meaning male owner.

Its forms here are:

• nominative: właściciel
• genitive: właściciela

If the owner were female, you would normally use właścicielka and then:

• Mam pełnomocnictwo właścicielki.

Yes. Mam pełnomocnictwo od właściciela is also natural and may feel a bit clearer to learners, because od explicitly means from.

Difference in feel:

• Mam pełnomocnictwo właściciela. = compact, formal, somewhat legal/official
• Mam pełnomocnictwo od właściciela. = also correct, slightly more transparent, often more conversational

Both can mean that you have authorization from the owner.

Not exactly.

• pełnomocnictwo is usually more formal/legal
• upoważnienie is often a more general authorization/permission

Very roughly:

• pełnomocnictwo = power of attorney / legal authority to act for someone
• upoważnienie = authorization / permission

In many real situations they may overlap, but pełnomocnictwo sounds more official.

Yes, it sounds fairly formal and official. It fits contexts such as:

• dealing with an office
• picking something up for someone
• handling a legal or administrative matter
• speaking to staff on behalf of the owner

A native speaker would probably associate pełnomocnictwo with business, administration, or law rather than casual everyday speech.

Yes, Polish word order is flexible, but Mam pełnomocnictwo właściciela is a normal, neutral order.

Other orders are possible, but they change emphasis. For example:

• Pełnomocnictwo właściciela mam. = emphasizes that it is the owner’s authorization that I have
• Właściciela pełnomocnictwo mam. = possible in a poetic or very marked way, but not the normal choice

For most learners, the original word order is the safest one.

A rough English-style guide is:

mahm pew-no-mots-NEETS-tvo vwah-shchee-CHYEH-lah

A few helpful points:

• ł sounds like English w
• cz sounds like ch in chop
• ci before a vowel often sounds like a soft ch/ty sound
• Polish stress usually falls on the second-to-last syllable

So the main stresses are roughly on:

• peł-no-moc-NIC-two? Actually in standard Polish: peł-no-moc-NIC-two?
• wła-ści-CIE-la

If you want a simpler practical approach, just make sure właściciela sounds like vwah-shchee-CYEH-la.

Polish has no articles, so there is no separate word for a or the.

That means właściciela can often be understood from context as:

• the owner
• an owner
• owner’s

In this sentence, context usually makes it clear that it means the owner whose authorization you have. Polish relies much more on context than English does for this.