Question: what is the difference between k1 visa and k3 visa?
Answer: K1 visa is for a fiance (fiancee) of a U.S. citizen (before marriage), while K3 is for a spouse of a U.S. citizen (after marriage). K1 visa doesn't require an immigrant petition (I-130), while K3 visa must have an immigrant petition filed for the beneficiary. ... K1 is a one-entry visa, while K3 allows multiple entries.