Identification in your nation

[Delanshar]

Everyone is given a party-issued ID card.
All important information such as age and address can be found on it.
They must be carried at all times.

[USSARC]

Implants in the skull

[The Elemental Nations]

The Elemental Nations use the Sons of the Patriots (SOP) system to track everyone, and everything! Nanomachines, in other words. When they are born, Elementalians are inject with Nanomachines, and given a serial code. Comrade Ishlin is #00000000000001.

[Nachfolgia]

every Nachfolgian is implanted with an ID chip when they first enter the military academies at age 6. when scanned with a special scanner, it will give you everything about the person including name, DOB, medical history and service history. there is a failsafe to prevent unauthorized persons from tampering ith the chip or digging it out of the body(mainly if captured or dead body is being scavanged for the chip). if the chip is tampered with in any way, it will detonate, not only will the info not be obtained but will kill the person who tried to obtain it.

[Constarus]

All Constarusian citizens have government-issued ID cards which they must have with them at all times. (It is not required for average citizens to display/wear it, however government employees and members of the secret police are expected to do so when in public.)

The card does not have much information actually written on it, it just has the person's picture, their name, identification number, and date of birth. However inside the card there is a chip which any member of the secret police can scan. It will bring up pretty much any information on that person, from their criminal record, to their biometric data, to what they had to eat at the Chinese restaurant the other day. There's also a tracking device inside the card. Very handy for finding criminals, as long as they don't leave the card at home.

Citizens are issued new cards (with new photographs on them) on a yearly basis. 

Sample:

IDs for government employees and secret police are the same except they have a blue background instead of teal.

[Grand Britannia]

For Honorary Britannians, yes.

Pure citizens do not require one.

[Davao Grande]

A DNA sample and a Citizen's Identification Number are issued within 12 hours after birth. The citizen may then be named.

When that citizen reaches 18, he/she is issued a Unified Identification Card by the local Communist Party. This card contains basic identification parameters and is linked to multiple servers. UIC's are also used to control access to restricted areas; a civilian's UIC cannot give him access to military installations, for example.

The basic parameters of height, mass, and others are updated every three years or after an operation involving alteration such as plastic surgery.

Wearing the UIC is mandatory; failure to present it to competent authority is punished accordingly.

[Aquinae]

All citizens have a 10-digit Personal Identification Number (PIN) and are required to carry a State ID card at all times.

The State ID card has a photograph, full name, PIN, address, date of birth, sex, height, weight, eye/hair/skin color and an identification bar code.

[Tiruna]

Everyone born in Tiruna is applicable for a National ID by the age of thirteen. Here is a sample:

[The Third Nova Terra of Scrin]

ID cards are a good method of identification as the government views it but the government had failed to effectively use ID cards as citizen identification.

The police uses fingerprints to identify criminals but however in a sense, the government really does nothing to identify citizens because of its limited capabilities other than plain sense and a combination of low-tech identification methods.

[Nortoapoco]

Nortoapoco has ID cards, but they aren't widely used. The police can identify whether a driver is legally permitted to drive via an app on their work phones, so there is no need to carry ID with you most of the time.

IDs are used primarily for the purpose of voting and for younger Nortoapocans to prove that they are legally adults.

Nortoapocan schools issue ID cards to all students, which are worn as part of the uniform. Students seen in their uniform without ID are in violation of the law. This helps us identify children more easily when they are up to no good. Nortoapocans who have finished school but are still legally minors tend to carry ID cards during school hours to prove that they are not truants.

[Immoren]

MT and FanT/PMT: Special ID-card is not requirement, but you can buy one if you want. Passport and driver's license are passable as ID, so specialized ID-cards are rarely acquired.
FT:Quick DNA (or similar molecule) scan is often enough to identify person.

[The Children of Mama]

We don't need "IDs". Every Child's angel tells the others who he or she is.

[Mama adds: There are over 5.3 billion Children who call me "Mama". I know every single one of them by name.]

[New Emperica]

Does your nation require ID cards or anything of the sort for its citizens?

All citizens are required from age 12 and up to carry a card with them that has their name, age, race, sex, orientation, and other important information. Though not required, from age 12 and up, a citizen also has the option of carrying a universal debit card that stores all of their money. Our process of out-phasing money is in it's infancy.

[Vallermoore]

A passport to cross the borders. Also, criminals have their fingerprints taken.

[The Cat Clans]

No ID card.
We know you from your scent.

[Arborlawn]

The government issues everyone, age 16 and above, with a national ID Card.

The ID Card includes Name, Gender (Also includes Self Identified Preference), Etc.

The ID Card also states whether or not the Citizen is a Descendant (Someone born of Arborlawnish Parents, in Arborlawn or outside of Arborlawn, basically, if they are Arborlawnish) or a Naturalized (Someone who immigrated and was naturalized, basically, an immigrant)

The ID Card also states Ethnicity and Religion. Arborlawnish Descendants are all ethnically Jewish. However, Naturalized are not necessarily Jewish. It states religion for the purpose of customs (So that a Jewish Officer does not offend a Muslim Naturalized or Christian Naturalized).

Etc.

[Syleru]

Citizens are bar-coded and chipped at birth. Bar-coding allows quick identification of their serial number, different for every citizen. When referred to by the government, regular citizenry are called by their serial number, which they have remembered since their fifth year. In all other cases citizens are referred to by their names of both English and Indian descent. Names and serial numbers are referred to in utmost highest formal meetings where their last name and number are said when addressed (i.e. "We thank Shanya - 1B4672H for the excellent dinner, and her classical music she brought with her.")

Chipping is used for tracking purposes, and while scanning it does work, it does take slightly longer than scanning the bar-code. Chipping is also used for communications, everyone's personal 'Phone and AUditor' number, or Pau, is on their chip so contacting others is as simple as scanning your chip to learn your phone number. Yes, everyone has their own personal scanner to input some information and learn others. In a conformist and orderly society, knowing everything is essential.

To exit the country, citizens must complete the PassPort section of their Pau and have it read and confirmed by a government official. Upon exiting, citizens have their barcodes scanned for their serial number so they can record it, their chip for all other info and their clothing and and body for potential terrorist or criminal devices. The same procedure occurs upon entering the nation, except much more rigorous and thorough. No criminal records above 'minor offense' may be on their chip or emigration and immigration is forbidden. No terrorist affiliation is allowed for emigration, immigration or residence within Syleru.

[Beringovia]

Beringovia does not have a national ID card per se, but the drivers license has become the de-facto national ID card, since virtually every adult has one.

[Mapletish]

All citizens are issued with a mandatory national ID card. Necessary information (name, DOB, address, employment, etc.) is on the card.

THIS ^ and with regards to forging it's pretty hard to forge,the one unique thing is that the Identification Card reader reads the unique chip placed at the back of the card and the card contains some very complicated computing chips in it that makes it very hard to forge.

[New Zepuha]

Everyone is labeled by a number underneath their clothing, a barcode on their right shoulder, and segregation, pssh why would we segregate an Aryan population, absurd they should be breeding strong healthy children. But yes, we also require ID cards for law enforcement usage.

[New Vinland]

Upon turning 21 years of age every citizen/resident of The Royal Dominion of Provinces of New Vinland must obtain a Biometric National ID Card obtained at a local National Registry Bureau. One is expected to carry the card at all times when in public. Although one is never stopped to check if one has their card, one may be fined for not having one if, for example, one is stopped by police for a traffic violation. One's Biometric National ID Card must be renewed every five years or sooner if there is a change of address, marital or citizenship/residency status, or gender.

Key features of the National ID Card -

Fingerprint Biometrics
Black and White Photo
Full Legal Name
Gender
Race
Marital Status
Date and Place of Birth
Citizenship Status
National Identity Number
Height
Weight
Eye Colour
Hair Colour
Blood type
Religion
Current Address

[Magical Equestria]

Ponies. "Cutie marks". We're guessing that we don't really need to explain this.

[Bajireyn]

Everyone in Bajireyn has a microchip implanted in them when they're very young ,it functions as a national ID card.

[Alternate Universe 912]

You are not legally required to have any form of identification with you at any time, though to access many government and private services you must prove your identity; for example, those attempting to buy age-restricted products such as drugs or alcohol must show proof of age in order to complete the purchase, and those attempting to set up bank accounts or take out loans must prove their identity.

If you commit a crime and the police want to either issue you with an on-the-spot fine or to report you for summons to court at a later date, it is not necessary to provide them with ID, but you must provide them with accurate information. If the officer has reason to suspect that you have supplied a false name or address, he may arrest you for the original offence; it is not an offence to supply a false name or address to the police, but it is grounds for arrest. This leads to a few arrests for very minor crimes each year, such as littering, because those accused refuse to give their details or give details the officer suspects to be false.

If an officer suspects that you have committed a traffic offence such as speeding or failing to wear a seatbelt, he may require you to provide him with your driver's license, proof of vehicle insurance, and vehicle safety inspection certificate. If you do not have them with you, the officer will issue you with a form which must be presented, together with all three of the above, to a police station within seven days. Failure to provide this information is an offence.

This.

National ID cards, licences, credit cards, passports, etc., are all separate documents in AU912. As a result, some comedians have pointed out that "wallet overcrowding" is a serious issue here.