What entry route applies to holders of an ordinary passport issued by Serbia?
Short answer
Serbian citizens may use the 30-day visa-free route only with a biometric passport issued after 9 April 2008; a visa is required in all other ordinary-passport cases, including Yugoslav passports.
Verified answer
A visa is required in all other ordinary-passport cases, including a non-biometric passport, a biometric passport issued on or before 9 April 2008, or an ordinary passport issued by Yugoslav.
This answer is supported by the current published entry Rule Version and the official Russian mission's Serbia-specific visa-free guidance.
What to do next
Use the traveler checker with Serbia as nationality and confirm whether the passport is biometric and was issued after 9 April 2008. If not, use the appropriate regular-visa route and verify the responsible mission's current checklist.
Open traveler checker