In Canada our postal codes are formatted:

X#X #X#

Where X is a letter and # is a digit.

The amount of forms, even on government websites that can't do the unfathomably complicated logic of stripping the space if it doesn't want it is baffling.

Regarding your credit card example, in my password manager where I paste my credit card number from, I added a no-spaces copy of the number for me to paste in because practically every input on the internet accepts spaces but has a max character limit. So if I paste it in with the spaces, it'll cut off the last 3 digits, making me go back, delete the spaces, and manually type in my last 3 digits that were removed.