2014年底一位匿名嘅告密者用加密嘅網路聊天連絡上一名南德意志報嘅記者巴先·歐伯馬爾（Bastian Obermayer）。南德意志報先前曾喺另一次莫薩克—馮賽卡律師事務所嘅文件洩漏案件中向德國政府舉報不法。該告密者話自己嘅人身安全受到威脅，堅持使用加密通訊，並且拒絕同任何人會面。喺歐伯馬爾同告密者交涉嘅過程中，他們不時更換加密嘅管道，並使用密語嚟確認雙方嘅身份，喺每次同告密者通訊完後，歐伯馬爾亦都立刻刪除所有嘅通訊紀錄。喺看咗一部份嘅文件後，報社連絡咗曾經處理離岸解密等文件洩漏新聞嘅國際調查記者同盟。
At the end of 2014, an anonymous whistleblower contacted a Süddeutsche Zeitung journalist·, Bastian Obermayer, via encrypted web chat. The Süddeutsche Zeitung had previously reported the wrongdoing to the Germany government in another case of a document leak at the Mossack-vonseca law firm. The whistleblower said his personal safety was at risk, insisted on using encrypted communications, and refused to meet with anyone. During the negotiation between Obermar and the whistleblower, they changed the encrypted pipes from time to time, used secret language to confirm the identities of both parties, and immediately deleted all communication records after each communication with the informant. After reading some of the documents, the newspaper contacted the International Investigative Journalist Alliance, which had dealt with the news of leaks such as offshore decryptions.