Any ideas about a country nearby that a South African passport holder could enter on a passport with under 6 months validity?
Someone is waiting for their new passport (and the old one is NOT canceled yet) and they need to come back to thailand on a 30 day visa exempt entry and wait for their new passport to arrive.
And before you start the real rule for entering thailand is that you must have more time left on your passport than you are being stamped in for NOT that you need 6 months on the passport to enter the country. That 6 month rule is to BUY a thai visa from a consulate.
TLDR : Answer Summary
A South African passport holder can enter various nearby countries with a passport that has less than 6 months of validity, as long as they are aware of specific entry requirements. Countries mentioned include Laos and Cambodia, which are noted for lenient checks on this rule. Malaysia offers a 3-month visa exemption but the passport validity specifics should be verified. Other options discussed are Hong Kong, with a requirement of at least one month validity beyond the stay, and Macau, which has similar leniency as Laos and Cambodia.