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 / Updated By Ammar Cheikh Omar, Richard Engel and Ben Plesser 
 
 The 23-question form looks like a standard job application — save for the black ISIS logo in the top right corner. 
 
 Thousands of documents apparently leaked from inside ISIS paint a detailed picture of the terror group's personnel, including a 20-year-old from Minneapolis with just a high-school education. 
 
 NBC News was among several media organizations to obtain a trove of recruitment forms from a man who claims to be a disillusioned ISIS fighter who recently defected. 
 
 Part of one of the leaked ISIS documents. Alongside an ISIS logo, it reads: "IN THE NAME OF ALLAH THE MOST GRACIOUS MOST MERCIFUL, THE ISLAMIC STATE IN IRAQ AND THE LEVANT, GENERAL BORDER ADMINISTRATION, MUJAHID DATA." NBC News / NBC News 
 
 The questions start off mundane — name, nickname, date of birth, education — and then shift to the more sinister. 
 
 Fields ask about previous fighting experience, blood type, special skills, level of obedience and whether the applicant is interested in fighting or becoming a suicide attacker. 
 
 The forms also ask for "countries traveled" to clarify the route to ISIS' caliphate and who can vouch for the recruit. 
 
 More than 22,000 jihadis are named in the files and some 51 nationalities represented, according to Britain's Sky News. The broadcaster — which also obtained and reviewed the documents — said many of the names were already "well-known" jihadis, such Londoner Abdel Bary. Other forms bore the names of jihadis known to have died on the battlefield, like former ISIS media-wing head Junaid Hussain. 
 
 German intelligence officials are reviewing the files, according to local media there. 
 
 Related: American Dies Fighting for ISIS in Syria 
 
 Federal police believe "that the documents are authentic," German Interior Minister Thomas de Maiziere said in an emailed statement noting the potential intelligence value of the trove. 
 
 A man who claims to be a disillusioned ISIS fighter who recently defected meets with NBC News' Chief Foreign Correspondent Richard Engel near Turkey's border with Syria on Wednesday. NBC News 
 
 "They provide a great chance for the procedure of furnishing proof and the participation also of Germans in terror activities," he said. "With this, we also better understand the structures of this terror organization and it will possibly function as a deterrent for some young radical people." 
 
 The cache could offer critical information to intelligence agencies — from routes taken by foreign fighters to previously-unknown recruits and recruiters. 
 
 The leak and its origin deal a blow ISIS itself, too, signaling weakness at a time when the organization has been coming under increasing pressure. 
 
 Related: Foreign Fighters Are Still Flocking to ISIS 
 
 Defense officials in recent weeks captured an ISIS official who has reportedly offered valuable information on the group's chemical weapons and operations while under interrogation. 
 
 U.S. airstrikes have been pounding ISIS weapons depots and an airstrike also is believed to have killed a top ISIS commander known as "Omar the Chechen" in Syria last week. ||||| (CNN) What's your first and last name? Your education and work experience? Do you have recommendations? 
 
 And are you willing to be a suicide attacker or would you prefer to be a fighter for ISIS 
 
 Those were among the questions purportedly posed to would-be jihadis on what appears to be a kind of job application for the terror group. 
 
 Germany's intelligence agency, a Syrian newspaper and other news organizations, including Britain's Sky News, obtained batches of leaked ISIS documents , which CNN could not authenticate and which seemingly could be replicated easily on many computers. 
 
 Germany's interior minister said he believes data in the documents -- described by European media as the names and personal data of tens of thousands of possible ISIS recruits -- could allow authorities to prosecute people who joined ISIS and then returned to their home countries. 
 
 While some responses to questions in the purported leaked documents are mundane, others make it obvious they're not part of just any application profile or database. 
 
 Take, for instance, one applicant's request to be a suicide attacker. He wants to be dispatched as soon as possible, to take his life and that of others, "as I have a headache because (of) shrapnel in my head." 
 
 A well-traveled Australian with a computer degree is also willing to go on a suicide mission. But he worries his night vision might be a hurdle. Plus, he doesn't know how to drive manual transmission vehicles. 
 
 Then there's a French national, born in 1989. Answering which relatives to contact if he's killed, the man said, "If they did not hear from him, they would know that he is dead." 
 
 Questions include 'level of obedience' 
 
 The forms are tied to one of the world's most reviled, barbaric, ruthless terrorist organizations. But they're also a function of bureaucracy. 
 
 Zaman Al-Wasl, a newspaper supportive of forces fighting against both Syrian President Bashar al-Assad's troops and terror groups such as ISIS, published 122 pages of documents it said came from an ISIS defector. These 122 documents, out of more than 1,700 overall reportedly obtained by the same publication, only pertain to self-identifying suicide attackers. 
 
 German intelligence officials said they, too, have similar if not identical documents, though they didn't detail how they got them. 
 
 While they include lines to be filled out later -- such as the site and time of a person's death -- the content mostly consists of questions and answers posed at a border crossing into territory controlled by the so-called Islamic State, according to Zaman Al-Wasl. 
 
 A black ISIS flag is neatly stamped on the right corner. At the top left corner is the terror group's version of a border entry stamp. The Arabic script is typed up, neatly arranged in rows and columns, with "private" stamped at the bottom. 
 
 The words include answers to simple questions such as the would-be militant's birth date, blood type, address, marital status and countries visited. 
 
 Others are slightly more specific and speak to the organization they want to join -- such as the person's religiosity (or "Sharia level"), jihad experience and "level of obedience." 
 
 German official: Documents likely 'genuine' 
 
 The dates of the border entry stamps suggest the documents published by Zaman Al-Wasl date back to no earlier than 2013. 
 
 That means the people questioned could have gone into ISIS-controlled territory, have been turned away or perhaps fought for the terror group in Syria and Iraq and then perhaps left. If they aren't in the war zone, one fear is that they may bring their ISIS approach, tactics and mindset elsewhere -- perhaps proving a threat to other countries. 
 
 The documents suggest the recruits came from many places including Afghanistan, France, Germany, Libya, Spain, Tunisia and Uzbekistan as well as Syria. 
 
 Markus Koths, a spokesman for the German Federal Criminal Police, said the documents appear to be authentic. 
 
 The alleged ISIS forms contain specific information about recruits from around the world. 
 
 "We believe that it is very likely these are genuine documents," Koths said. "We are taking these into consideration of our law enforcement measures and security. " 
 
 Also addressing the documents, British Home Secretary Theresa May said the "severe threat" posed by ISIS underscores the importance of countries sharing information and taking other steps against the group. 
 
 "We have seen the attacks perpetrated on mainland Europe over the past year," May said, referring to terrorism in Paris and elsewhere. "That is why it is so important for us to work together to counter this threat." 
 
 Form has 23 items 
 
 The form featuring 23 questions and other items is short and to the point, delving into the recruits' background and way of life. Here's the information asked of each applicant: 
 
 -- First and last name 
 
 -- Assumed name 
 
 -- Mother's name 
 
 -- Blood type 
 
 -- Date of birth/ nationality 
 
 -- Marital status 
 
 -- Address and place of birth 
 
 -- Education 
 
 -- Sharia (or religious) level 
 
 -- Previous job 
 
 -- Countries visited 
 
 -- Point of border entry 
 
 -- Date of entry 
 
 -- Who recommended you 
 
 -- Previous jihad experience 
 
 -- Fighter or suicide attacker 
 
 -- Field of specialty 
 
 -- Current working place 
 
 -- Personal properties left behind 
 
 -- The level of obedience 
 
 -- Address for future communication 
 
 -- Date of death and place 
 
 -- Notes ||||| Tens of thousands of documents, containing names, addresses, telephone numbers and family contacts of Islamic State jihadis, have been obtained by Sky News. 
 
 Nationals from at least 51 countries, including the UK, had to give up their most personal information as they joined the terror organisation. 
 
 Only when the 23-question form was filled in were they inducted into IS. 
 
 A lot of the names and their new Islamic State names on the registration forms are well-known. 
 
 Abdel Bary, a 26-year-old from London joined in 2013 after visiting Libya, Egypt and Turkey. 
 
 Play video "The Impact Of The IS Cache" Video: The Impact Of The IS Cache 
 
 He is designated as a fighter but is better known in the UK as a rap artist. 
 
 His whereabouts are unknown. 
 
 :: Who Are The Britons In The Islamic State Files? 
 
 Another jihadi named in the documents, now dead after being targeted in a drone strike, is Junaid Hussain, the head of Islamic State's media wing who along with his wife former punk Sally Jones, plotted attacks in the UK. 
 
 Her whereabouts are unknown. 
 
 Reyaad Khan from Cardiff, who also entered in 2013, is also among those found among the registration forms. 
 
 He was well known for appearing in a highly produced Islamic State propaganda video. 
 
 He was later killed. 
 
 But the key breakthrough from the documents is the revealing of the identities of a number of previously unknown jihadis in the UK, across northern Europe, much of the Middle East and North Africa, as well as in the United States and Canada. 
 
 Their whereabouts are crucial to breaking the organisation and preventing further terror attacks. 
 
 Many of the men passed through a series of jihadi "hotspots" - such as Yemen, Sudan, Tunisia, Libya, Pakistan and Afghanistan - on multiple occasions, but were apparently unchecked, unmonitored and able to both enter Syria to fight and then to return home. 
 
 One of the files marked "Martyrs" detailed a brigade manned entirely by fighters who wanted to carry out suicide attacks and were trained to do so. 
 
 Play video "How Sky News Got Secret IS Files" Video: How Sky News Got Secret IS Files 
 
 :: IS Files: A 'Goldmine Of Information' For Intelligence Agents 
 
 Some of the telephone numbers on the list are still active and it is believed that although many will be family members, a significant number are used by the jihadis themselves. 
 
 The files were passed to Sky News on a memory stick stolen from the head of Islamic State's internal security police, an organisation described by insiders as the group's SS. 
 
 He had been entrusted to protect the organisation's core secrets and he rarely parted with the drive. 
 
 The man who stole it was a former Free Syrian Army convert to Islamic State who calls himself Abu Hamed. 
 
 Disillusioned with the Islamic State leadership, he says it has now been taken over by former soldiers from the Iraqi Baath party of Saddam Hussein. 
 
 He claims the Islamic rules he believed have totally collapsed inside the organisation, prompting him to quit. 
 
 I met him in a secret location in Turkey, and he said IS was giving up on its headquarters in Raqqa and moving into the central deserts of Syria and ultimately Iraq, the group's birthplace. 
 
 He also claimed that in reality Islamic State, the Kurdish YPG and the Syrian government of Bashar al Assad, are working together against the moderate Syrian opposition. 
 
 Asked if the IS files could bring the network down he nodded and said simply: "God willing". 
 
 From the attacks in Tunisia and the Bataclan massacre in Paris, it is clear that IS is refocusing its base of operations abroad and is intent on carrying out high-profile attacks in Western countries, something that security chiefs across Europe are warning about right now. 
 
 Sky News has informed the authorities about the haul.
– It seems applying to join ISIS isn't so different from applying to be a Subway sandwich artist. NBC News reports thousands of what appear to be ISIS recruiting forms were leaked to various news agencies by a "disillusioned" member of the terror organization. CNN has the full list of 23 questions from the forms. Those questions include normal job application queries (education level, current employer, and recommendations) as well as some questions not likely to be asked by your local HR department—religious level, previous jihad experience, obedience level, and preference for becoming a fighter or suicide attacker. Of more use to intelligence agencies around the world, the leaked documents include the names, addresses, phone numbers, and travel routes of ISIS members, Sky News reports. The names not already known by officials include ISIS members in the Middle East and beyond, including the US and Canada. Officials believe this information could be key in preventing future terror attacks. The documents, which include a file marked "martyrs," also shed light on the mindset of people hoping to become suicide attackers. One applicant wrote he was interested in a suicide mission because "I have a headache because (of) shrapnel in my head." An Australian man was also interested in becoming a suicide attacker but worried about his poor night vision and inability to drive stick.