When you register for M-Pesa, you will set your confidential Personal Identification Number (PIN). PIN is required to authorise all your transactions and to get any account information. The PIN is not stored anywhere on the phone or at any server. The transmission between you and the server is highly secure and is done using encryption mechanism ensuring highest safety and security standards. The PIN is known to the M-Pesa account holder only. Even people at Vodafone or at the bank do not have access to your PIN as it is stored in our system in an encrypted format. Your money will always be safe even if you have accidently lost your phone, so long as you have not disclosed your PIN to anyone.