Collection Africa Limited | 634 followers on LinkedIn. Collection Africa Limited (CAL) is a debt management outsourcing service, which is designed to provide our clients with a bad debt resolution tool. CAL began its debt management outsource services to banking institutions n 2001 when established as the specialist debt collection organization within the CRBAfrica group purposefully to deliver debt portfolio management services to banks on their retail debts. Retail debt is characterized by high volume and relatively low value per debt.