A remittance is a payment that gets sent somewhere else. If you get a bill in the mail, you will usually have at least a week to send your remittance.
To "remit" is to send money or make a payment and what you send is called remittance. Buying anything from a website involves a remittance — usually from a grownup's credit card, just as keeping your cell phone going requires a regular remittance to cover minutes and messages. If you go on a trip and run out of money, you might need an emergency remittance for a plane or train ticket to get home.
