You can request money from other Revolut users by going to the 'Payments' section in the app and selecting a contact with an 'R' next to their name. This will instantly send them a notification.
For people without the app, we'll create a payment link so that they can pay you back by debit or credit card in SGD. Please note that we may charge you a small fee to cover our costs. We will let you know if this fee is applicable to you and how much it is before you complete your transaction.