PPI claim again?

[Deleted User]

Larley wrote: »

I really don’t know where to start, as I wouldn’t still have any paperwork related to these loans. Because he applied I’m guessing, that he would have contacted all companies (??).

Nobody here can know, of course, but it's reasonable to assume that if your late husband complained (not "applied") about PPI with one lender and was successful then he may well have looked into making other PPI complaints as well.
The only way for you to be more certain is to contact all the likely banks and lending institutions and ask them if he had PPI with them. They'll soon tell you if you've already complained and/or if you did not have PPI. Could be a long and arduous process. though, and time is now very short.