Asking for a debt to be repaid is an uncomfortable but sometimes necessary part of being an office admin. Usually, sending a friendly reminder or giving a courtesy call is enough to prompt the customer to pay you. But if the customer isn’t responsive, you might have to escalate the situation. When payment first becomes overdue, give your customer a courtesy reminder by phone, email or by posting a letter. They might have forgotten about the bill or paid into the wrong bank account, so this first reminder might be enough to get the invoice paid. If the customer still hasn’t paid and has missed extended payment dates again, call or email to discuss the outstanding invoice and request payment.