Importer's own cheque
The importer (the payer or debtor) may choose to pay you, the exporter, using a cheque issued by them. This is not common in exporting especially between countries that have little common ground in as far as their banking systems are concerned. Your risk is that the cheque may 'bounce' (go unpaid) and it is a cumbersome means of payment because when you attempt to deposit the cheque, your bank will almost certainly want to send the cheque back through the banking channels to the importer's bank to request them to transfer the funds to your bank, only after which they will pay you (unless they have an existing relationship with the overseas bank). This will take time and cost you money (assuming that no administative problems raise their head). This method of cash payment is to be discouraged.
Banker's demand draft (D/D)
This is a better form of cash payment than an importer's cheque and involves the importer's bank arranging a demand draft (a special written bank instruction) which is issued to the importer for him/her to send by post or courier or to deliver personally to the exporter. It is the importer's responsibility to ensure that the demand draft gets to the exporter. When the exporter receives the demand draft, he/she will approach the importer's bank's correspondent bank in South Africa for payment (or ask their own local bank to make the approach to the correspondent bank for payment). As the demand draft may be posted or delivered by hand, it may get lost or damaged in the process. A banker's draft cannot be stopped and a new draft will only be issued with a guarantee of indemnity from the importer/exporter.