You go to a business as a salesperson from your company in the foreign country of your choice. The buyer for a major potential client firm refuses to consider having the company purchase your firm's product unless you offer him a $5,000 "gift." Your promotion may be riding on the success of this business trip, and you have worked very hard to develop this relationship with this foreign company.
If you do not make this offer to the buyer, you have very good reason to believe that your major competitor will. You do not want to lose this sale, but you also do not want to do anything illegal and/or unethical.