We handle export declarations for fish products, handicraft, personal effects, equipment going back to a supplier and goods leaving on a temporary basis.
Export is mostly documentation, and the risk sits at the far end rather than here. A consignment refused at the destination is a consignment you pay to bring home, so the description on the invoice and the certificates the receiving country expects matter more than anything that happens at this port.
For equipment going out for repair we deal with the temporary export properly, so that the same item coming back is not treated as a fresh import with fresh duty on the whole value. Importers discover that one the hard way roughly once a year.
Personal effects for somebody moving abroad are a small job we do often, and the honest advice is frequently that shipping a container of furniture costs more than the furniture.