Visitors to Ethiopia may be required to produce a yellow fever certificate upon arrival in a third country, following a stay in Ethiopia.

Take a record of your immunisations when you go travelling, especially your yellow fever certificate.

You will be asked to produce a yellow fever vaccination certificate on arrival in the country.

Travelers entering Venezuela from certain countries are required to have a current yellow fever vaccination certificate.

Travelers coming from yellow fever-infected areas may be asked to present a yellow fever vaccination certificate.

They require a yellow fever certificate of all travelers arriving from a country with risk of yellow fever, even if you are only in transit.

If you have bad luck, the entrance staff asks you for a yellow fever certificate.

We just heard that apparently travelers to Zambia may now be required to have a yellow fever certificate before being allowed to return to South Africa.

Do you need the yellow fever certificate if you're traveling from Europe as well?

As a south african coming back from another high risk country, your yellow fever certificate will be checked at immigration - it has happened to me.