in my experiances here in my state the court never allowed a tenant to claim they didnt get the notice (s) when mail was sent via certificate of mailing ( tenant does not have to sign for it ) and then of course confirmed mail delivery ( no signature needed) goes one step better, so once the mail carrier leaves it then the courts accept that it was indeed delivered and are not likely to accept any claim of not getting it. I used to make a extra copy of the first notice that was sent via certificate of mailing and send that extra copy out a day later so that way I had two attempts two different days. so even if tenant lied to a judge the judge would see two different receipts . and again they are not married so one notice is not good enough one notice to each of them is proper notice and if you had to take them in to court your eviction wont be rejected because you didnt issue proper notice to each.