If a credit provider does not ask you or contact you for payment, start legal action against you or make contact with you in any way for three years (or the relevant time period, depending on your loan type), a debt becomes prescribed. That means the debt is basically cancelled and the credit provider loses his right to claim payment back from the debtor ever again. So, how does prescribed debt work?
Of course, this is follows certain conditions, for example: that you did not move or change your contact details, during the prescription period, without informing the credit provider. Prescription will not apply if the credit provider can provide reasonable evidence that they tried to contact you during the prescription period.
If the lack of contact is on your part, attempting to force prescription, then the creditor has all their rights. Only if they are at fault does prescription come into effect.