[Edited to add: I should have made it more clear that I’m only interested in federal laws regarding this situation; obviously state laws could add more factors.]) Suppose a new homeowner discovers firearms left behind by the previous homeowner. If the new homeowner decides to take possession of those firearms, is that legally the same as an in-state private transfer? Basically, would the legal principles involved be the same as if the firearms were privately transferred face-to-face by residents of the same state? Also, what if the previous homeowner had already moved out-of-state before the new homeowner moved in and took possession of the firearms? Would that count as an illegal interstate private transfer, or would the fact that the firearms were abandoned by the previous homeowner before he moved out-of-state be a factor? Just to be clear, this isn’t a question about what the new homeowner should do, this is simply a question about how federal transfer laws would apply to this hypothetical situation. Thanks!