FWIW - Recent flights on TP236 (SFO - LIS) I did not get PRE. Was just looking through my account profile on TAP's site and there is indeed no spot for the KTN. Interestingly enough, TAP is saying that its valid at EWR, JFK, Boston or Miami (
https://www.flytap.com/en-us/at-the-...3-ff9a14ac1d98 ).
I'll see about getting the KTN added at the airport next time around..