Machine-readable passport

A machine-readable passport (MRP) is a machine-readable travel document (MRTD) with the data on the identity page encoded in optical character recognition format. Many countries began to issue machine-readable travel documents in the 1980s. Most travel passports worldwide are MRPs. The International Civil Aviation Organization (ICAO) requires all ICAO member states to only issue MRPs as of April 1, 2010, and all non-MRP passports must expire by November 24, 2015.^[1]

Machine-readable passports are standardized by the ICAO Document 9303 (endorsed by the International Organization for Standardization and the International Electrotechnical Commission as ISO/IEC 7501-1) and have a special machine-readable zone (MRZ), which is usually at the bottom of the identity page at the beginning of a passport. The ICAO 9303 describes three types of documents corresponding to the ISO/IEC 7810 sizes:

• "Type 3" is typical of passport booklets. The MRZ consists of 2 lines × 44 characters.
• "Type 2" is relatively rare with 2 lines × 36 characters.
• "Type 1" is of a credit card-size with 3 lines × 30 characters.

The fixed format allows specification of document type, name, document number, nationality, date of birth, sex, and document expiration date. All these fields are required on a passport. There is room for optional, often country-dependent, supplementary information. There are also two sizes of machine-readable visas similarly defined.

Computers with a camera and suitable software can directly read the information on machine-readable passports. This enables faster processing of arriving passengers by immigration officials, and greater accuracy than manually-read passports, as well as faster data entry, more data to be read and better data matching against immigration databases and watchlists.

Apart from optically readable information, many passports contain an RFID chip which enables computers to read a higher amount of information, for example a photo of the bearer. These passports are called biometric passports and are also described by ICAO 9303.

Passport booklets have an identity page containing the identity data. This page is in the TD3 size of 125 × 88 mm (4.92 × 3.46 in).

The data of the machine-readable zone consists of two rows of 44 characters each. The only characters used are A–Z, 0–9 and the filler character <.

In the name field, spaces, hyphens and other punctuation are represented by <, except apostrophes, which are skipped. If the names are too long, names are abbreviated to their most significant parts. In that case, the last position must contain an alphabetic character to indicate possible truncation, and if there is a given name, the two fillers and at least one character of it must be included.

Smaller documents such as identity and passport cards are usually in the ID-1 size, which is 85.6 × 54.0 mm (3.37 × 2.13 in), the same size as credit cards. The data of the machine-readable zone in a TD1 size card consists of three rows of 30 characters each. The only characters used are A–Z, 0–9 and the filler character <.

Some official travel documents are in the larger ID-2 size, 105.0 × 74.0 (4.13 × 2.91 in). They have a layout of the MRZ with two rows of 36 characters each, similar to the TD3 format, but with 31 characters for the name, 7 for the personal number and one less check digit. Yet some official travel documents are in the booklet format with a TD3 identity page.

The format of the first row for ID-1 (credit card size) documents is:

The format of the second row is:

1: United States Passport Cards, as of 2011, use this field for the application number that produced the card. ^{[citation needed]}

The format of the third row is:

The format of the first row for ID-2^[3] (medium size) documents is:

The format of the second row is:

The ICAO Document 9303 part 7 describes machine-readable visas. They come in two different formats:

• MRV-A - 80 mm × 120 mm (3.15 in × 4.72 in), 2 × 44 chars
• MRV-B - 74 mm × 105 mm (2.91 in × 4.13 in), 2 × 36 chars

The format of the first row of the machine-readable zone is:

The format of the second row is:

The ICAO document 9303 part 3 describes specifications common to all Machine Readable Travel Documents.

The dimensions of the effective reading zone (ERZ) is standardized at 17.0 mm (0.67 in) in height with a margin of 3 mm at the document edges and 3.2 mm at the edge against the visual readable part. This is in order to allow use of a single machine reader.

The nationality codes shall contain the ISO 3166-1 alpha-3 code with modifications for all formats. The check digit calculation method is also the same for all formats.

Some values that are different from ISO 3166-1 alpha-3 are used for the issuing country and nationality field:^[4]

• BAH: Bahamas (erroneously used in some early Bahamian passports; corrected to BHS)
• D: Germany
• EUE: European Union
• GBD: British Overseas Territories Citizen (BOTC) (note: the country code of the overseas territory is used to indicate issuing authority and nationality of BOTC), formerly British Dependent Territories Citizen (BDTC)
• GBN: British National (Overseas)
• GBO: British Overseas Citizen
• GBP: British Protected Person
• GBS: British Subject
• UNA: specialized agency of the United Nations
• UNK: Resident of Kosovo to whom a travel document has been issued by the United Nations Interim Administration Mission in Kosovo (UNMIK)
• UNO: United Nations organization
• XBA: African Development Bank
• XIM: African Export–Import Bank
• XCC: Caribbean Community or one of its emissaries
• XCO: Common Market for Eastern and Southern Africa
• XEC: Economic Community of West African States
• XPO: International Criminal Police Organization
• XOM: Sovereign Military Order of Malta
• XXA: Stateless person, as per the 1954 Convention Relating to the Status of Stateless Persons
• XXB: Refugee, as per the 1951 Convention Relating to the Status of Refugees
• XXC: Refugee, other than defined above
• XXX: Unspecified nationality
• ZIM: Zimbabwe (erroneously used in some early Zimbabwean passports; corrected to ZWE)

Other values, which do not have broad acceptance internationally, include:

• NSK: Neue Slowenische Kunst passport (basically not accepted at all as passport)
• RKS: Kosovo
• WSA: World Service Authority World Passport (basically not accepted at all as passport)
• XCT: Turkish Republic of Northern Cyprus

Implementation challenges

Uruguay currently issues passports with the country of birth code in the place of the citizenship code, affecting naturalised citizens as their passports return "error", causing significant travel challenges for passport holders. This is due to a combination of the official Spanish translation of 9303 using "nacionalidad" rather than "ciudadania" to reflect the English original of citizenship - notable in part 3 section 7.1 which specifically addresses this potential error. In October 2023, the high level technical team of TAG/TRIPS4 addressed the Uruguay case and it is proposed the translation is adjusted and the update is communicated to Uruguayan authorities. Uruguayan authorities have committed to reviewing their policy on the understanding citizenship should be used, which overcomes the challenge of domestic definitions of nationality currently differing from citizenship.

The check digit calculation is as follows: each position is assigned a value; for the digits 0 to 9 this is the value of the digits, for the letters A to Z this is 10 to 35, for the filler < this is 0. The value of each position is then multiplied by its weight; the weight of the first position is 7, of the second it is 3, and of the third it is 1, and after that the weights repeat 7, 3, 1, and so on. All values are added together and the remainder of the final value divided by 10 is the check digit.

Due to technical limits, characters inside the Machine Readable Zone (MRZ) need to be restricted to the 10 Arabic numerals, the 26 capital Latin letters A through Z, and the filler character <.

Apostrophes and similar punctuation marks have to be omitted, but hyphens and spaces should be replaced by an opening angle bracket.

Section 6 of the 9303 part 3 document specifies transliteration of letters outside the A–Z range. It recommends that diacritical marks on Latin letters A-Z are simply omitted (ç → C, ď → D, ê → E, ñ → N etc.), but it allows the following transliterations:

• å → AA
• ä → AE
• ð → DH
• ij (Dutch letter; capital form: IJ, the J as part of the ligature being capitalized, too)→ IJ
• ö → OE
• ü → UE or UXX
• ñ → NXX (allowed^[5] but Spanish uses U and N for ü and ñ)

The following transliterations are mandatory:

• æ → AE
• œ → OE
• ß → SS
• þ → TH

In Germany, Austria, Switzerland and Scandinavia it is standard to use the Å→AA, Ä or Æ→AE, Ö or Ø→OE, Ü→UE, and ß→SS mappings, so Müller becomes MUELLER, Gößmann becomes GOESSMANN, and Hämäläinen becomes HAEMAELAEINEN. ð, ñ and ü occur in Iceland and Spain, but they write them as D, N and U.

Austrian passports may (but do not always) contain a trilingual (in German, English, and French) explanation of the German umlauts and ß.

Russian visas (and Russian internal passports since 2011) have a different transliteration of Cyrillic into the machine-readable zone. As an example, the letter "ч" is usually transcribed as "ch" in Russian travel documents, however, Russian visas and internal passports use "3" in the machine-readable zone instead. Another example is "Алексей" (Cyrillic version) → "ALEKSEQ" (machine readable version in an internal document). This makes it easier to transliterate the name back to Cyrillic.

For airline tickets, visas and more, the advice is to only use the first name written in the passport. This is a problem for people who use their second name (as defined by the order in the passport) as their main name in daily speech. It is common, for example in Scandinavia, that the second or even third name is the one defined for daily usage: for example, the actor Hugh Laurie, whose full name is James Hugh Calum Laurie. Swedish travel agents usually book people using the first and daily name if the first one is not their main name, despite advice to use only the first name. If this is too long, the spelling in the MRZ could be used.

For people using a variant of their first name in daily speech, for example the former US president Bill Clinton whose full name is William Jefferson Clinton, the advice is to spell their name as in the passport.

In Scandinavian legislation, a middle name is a name placed between the given name and surname, and is usually a family name. Such names are written as an extra surname in passports. People have been stranded at airports since they entered this extra family name in the "middle name" field in airline booking forms, which in English speaking tradition is a given name.

Chinese, Japanese, Korean and Hungarian names might pose a challenge too, since the family name is normally written first. Tickets should use given name and surname as indicated in passports.

This name issue is also an issue for post-Brexit EU women under the Brexit settled status (they have two family names, a birth and marriage name, but only the birth name was used by the passport MRZ and therefore used in the settlement application, although they have been using the married name in UK population register).^{[further explanation needed][6]}

• Basic Access Control
• Biometric passport
• Card standards
• ISO/IEC 14443 (Proximity card standard)
• List of national identity card policies by country
• Identity document
• Identity Cards Act 2006 of the United Kingdom
• Universal Electronic Card

• A description of the Machine Readable Passport Zone
• MRTD - Machine Readable Travel Document - Home (ICAO)
• ICAO Standards for e-Passports: Machine Readable Travel Documents