Will PR card number change after renewal
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PR card number and PR ID numbers (UCI#) are not the same. PR card number is the alpha-numeric on the back (2 letters + 7 numbers).
Since a UCI doesn't change, do you know if the PR card number (on the back) changes (like a passport)?
The number on the back will be different for renewed PR card, mine is. How is that significant?
As I understand it (but I have no inside info):
-the PR number or UCI on the front is unchanging and will stay with a PR/citizen (or even one-time TRV holder) for life. That's how you identify yourself, basically. It's irrelevant whether the card is 'valid' or whatever else - it's used to identify you (or more accurately perhaps, your file(s) in the system). Hence unique client identifier. Largely speaking it's the most relevant.
-I believe the number on the back is the physical card identifier. You may get asked to enter it in certain circumstances to ensure that you have a current, valid, physical card, including one in the database. Changed any time they issue a new one (and flag old ones as expired or stolen or lost, for example).
I assume that this latter number may also have some security features/mathematical formulae behind it that allows it to be identified as (potentially) a real card, i.e. a random string of letters and numbers can be identified as fake, and/or links it somehow to the holder of the card (checksums of some of the info on the front encoded in that number). Note, I don't know anything about this, but it's pretty simple stuff to do - it would allow check-in personnel to key in or even read over a phone small subsets of data and get some kind of 'seems legit' or 'check again' response. Or in simple terms, somewhat like a credit card number can be identified as not real with a simple algorithm. Not the only security feature of course but one that doesn't require physical examination.
I concur; The ID number on the front of the card (being the PR's UCI number) will not change on any future PR cards. It also seems to make sense that the number on the back will change, since that's how most passports are updated as well. However...why does a DL always keep the same number?
I do wonder about the string of numbers and characters on the lower back of the card. It's easy enough to discern the UCI number and D.O.B., but beyond that...no clue.
Driver's license: same approach basically. At least in Ontario there's another set of numbers on back, as well as bar and qr-type block codes.
And now that I check I see the PR card has bar codes as well. The string of numbers and whatnot below is similar, but designed for a VERY simple machine-readable format that is basically the same as in passports - the scheme was devised or approved by ICAO for international use ages ago (like 30-50 years, too lazy to look it up).
For passports, you can loook it up how it breaks down, I presume somewhere you could find this for the PR card, or break it down with a few cards and a bit of work, but I can't be bothered.
I think he is talking about alpha numeric number back of your card
Yes it changes I compared my spouse pr card and renewed pr card both have different numbers
Yes it changes I compared my spouse pr card and renewed pr card both have different numbers