The job this tool does, and who does it today
Fee collection is not a finance problem in most schools and coaching institutes. It is a communication problem with a finance consequence. The money is usually available; the reminder either did not reach the person who pays, or reached them at a moment when they could not act on it.
Today the job belongs to an accounts clerk with a fee register and an accounting package, supported by class teachers who are asked to tell the parents. Reminders are posted in class groups, which embarrasses some families and is ignored by others. Notes go home in diaries. At term end somebody reconciles the register against the bank and discovers the real outstanding figure.
A student fee reminder generator does one narrow thing: it turns the fee schedule into a list of messages with dates, recipients, amounts and an escalation path, and it stops sending as soon as the money arrives.