About
Paul Montero
Founder and instructor
Paul has spent his career in fraud prevention and payments risk, working across many markets in Latin America, Europe, and Asia, on both the payment-provider and the merchant side.
For the last several years his focus has been Indian payments, one of the most complex fraud environments anywhere: UPI, cards, wallets, and lending, each with its own fraud patterns, data, and regulator. The courses on Ledgerline are the analysis habits, queries, and models that work came out of.
Why these courses exist
Most data training is either a tool certification that never touches a real business table, or a general analytics overview that stops before the work begins. People learn the actual job from whoever sat next to them. When that person leaves, the knowledge leaves with them.
I have spent my career on the risk and fraud side of payments, where analysis has consequences: a wrong number blocks a good customer or lets a fraud ring through. The habits that came out of that, question first, clean data, honest evaluation, a write-up someone else can check, are what these courses teach. They apply to any team that has to decide things with data, not only to fraud.
How they are made
Every course is built around a dataset that looks like real Indian business data, with the mess left in: UPI and card payments, partial refunds, duplicate rows, dates in three formats. Chapters are written first and recorded second, so the text stands on its own. Each course ends in a capstone you could show a manager.
One full chapter of every course is free to read on the site. That is the sales pitch. If the writing does not work for you, the course will not either.
What this is not
Not a certification. Not a placement programme. Not legal, regulatory, or investment advice. We do not publish testimonials or enrolment numbers, and we do not promise outcomes. The syllabus and the free chapter are the whole case.
The company
Ledgerline Learning Private Limited is a private limited company registered in India, CIN U85499DL2026PTC441870, GSTIN 07AAGCL4821Q1ZX. Registered office: Unit 204, Second Floor, Plot 17, Nehru Place, New Delhi 110019, Delhi, India. Payments are processed by an RBI-authorised payment aggregator. See Contact for how to reach us.