How serious is an expired passport? [closed]

I am in Europe, my passport is expired about 3 months ago, but i am tied up here due to active court case for my visa. I can't renew my passport because there is no embassy here for my country. I can't do anything about not having a renewed passport, and I can stay here until the appeal is heard (might take 3-18 months)…

So how serious is it to not have a renewed passport? I don't plan on traveling outside this country. Do you know what actions are commonly taken for people who have expired passport? I have been here now for 5 years.

I am in Finland, I am from Mongolia. More importantly, is there any international rule about having a valid up to date passport at all times?

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What if my passport is close to expiring?

Yes, you will be denied entry abroad if your passport is about to expire. Additionally, if you need a visa, you won't receive one with a passport with a validity of less than six (sometimes three) months. For this reason, you have to make sure that your passport is up-to-date before you travel.

Can I trouble with an expired passport?

Recently expired passports cannot be used to travel from the United States to an international destination or to travel to a foreign country for any length of stay longer than an airport connection en route to the United States or to a United States territory.

How long can you use an expired passport?

U.S. citizens currently abroad whose passports expired on or after January 1, 2020, may be able to use their expired U.S. passport for return travel to the United States until March 31, 2022.

Can You Travel With An Expired Passport?

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