If your goods were exported by a shipping company you do not need to get a customs stamp on your receipt (from a customs office at the airport). Instead we will need to receive 2 official customs documents (mentioned below).
Ask your shipping company to draw up these documents before you ship your goods. These documents can not be provided by your shipping company after your goods have already been shipped.
Some shipping companies provide the EX-A and Confirmation of Exit separate from each other. Some companies combine the the 2 documents to form 1 document. In the example below the documents have been combined.
Please note; there are strict requirements regarding the information that should be present on your export documents. You can read more about the requirements here.