>> If a company didn't bother to retain records on who bought something they are now required to recall due to safety failures I am not aware of any law in the

>> If a company didn't bother to retain records on who bought something they are now required to recall due to safety failures I am not aware of any law in the US ( talk on US laws because you discuss it later in your comment) that requires by business to keep sales records for the purposes of recalls, the only businesses required to do that are business that sell regulated goods, (firearms, explosives, Drugs, certain chemicals, etc) Normal Consumer Goods are recalled all of the time with out the Manufacturers, or Retailers having a master list of every person that bought that item.