Find and read some articles online or watch videos that describe the details of storing financial information for mobile payment systems, accessing the information when needed, and transmitting the information securely. What security measures are in place? Where is the data actually stored? What information is actually transmitted at the point of transaction?

answer; defense;

i would first let him be aware that a cover letter is official and confidential and it requires a proper formatting so that the employer doesn't have hard time when going through it. he should write it in paragraphs of about two to four sentences and use proper grammar a , spelling and proper punctuation. i will also advice him not to be emotional and not also to use images.then base his attention to the details of the job described and not other things. that is he be specific to the responsibilities and to the employers requirements. on this he should make sure that the letter reflects how good he is for the requirements detailed by the employer

the letter should not be too long nor too short.