Your membership number is the first group that appears immediately above your name on the mailing label that is somewhere on the cover page on your latest TCA. The postal or zip code you need to input is the one that appears on your mailing label. If you have moved since receiving your last TCA and you HAVE notified RAC of you change of address, then use the postal code you sent us. Do not substitute the letter "o" for a zero and vice-versa. Canadian postal codes are composed of a letter, a digit, a letter, a space, a digit, a letter, a digit.