From Qantas Frequent Flyer Platinum One
To Singapore Airlines KrisFlyer KrisFlyer Elite Gold

Qantas Platinum One and Virgin Platinum to Krisflyer Gold. Sent copy of flight history and photo of membership cards to Krisflyer. Approved after about a month. Perhaps worth noting that I was previously Krisflyer Gold and missed out on re-qualification by about 12,000 miles (38,000 miles accrued from four business class flights).