When a seedbank that is in England for example, They do keep a record however they store those on a online server in Holland so the Feds will not try and get them.
And do not worry the Feds want to get harder drugs like Herion,Coke,Meth.
They will not go get a search warrant for buying 10 seeds because that would be a waste of money.
Oh, and the day that the feds come to someones 4-6 plant grow, I'll give up my american citizenship and move to Canada! They won't waste the $ on us.....=)