AS PER ATTACHED EMAIL:
When you come to this appointment, you must bring with you:
this notice;
2 pieces of personal identification, one of which has your photograph and signature on it;
(e.g. driver's license, health card, etc.);
all your original documents that support your citizenship application (as listed in the document
checklist in the citizenship application form);
Permanent Resident Card (if you have ever received one);
all original passports and travel documents in your possession (current and expired).
Thanks! I think you are referring to the test invite letter, while I am concerned about the oath invitation letter.