If there's a refrain which will be sung several times identically, and once differently, it may be helpful to list everything up to the start of the secon refrain in order, but with the refrain preceded by REFRAIN: and followe by a blank line, and with the text of every matching refrain replaced with REPEAT REFRAIN, preceded and followed by a blank line. Precede the final refrain with "FINAL REFRAIN:", and then print the whole thing.
If the refrain is long, and only the last line or two are different on the last repetition, it may be reasonable to print the refrain as something like:
REFRAIN:
This is the first line
and this is the next.
This is the third and
The fourth an the rest.
The fifth line goes here
and the sixth one--have faith
(NORMAL REFRAIN)
Goes before the seventh
and also the eigth.
(FINAL REFRAIN)
Has fallen from heav'n and
Turned into a wraith.
Such an approach would only make sense if the amount of repeated text in the refrain was large relative to the amount that's different, but I think most singers would be able to follow a song sheet written as above, especially if "REPEAT REFRAIN" was replace with "SING FINAL REFRAIN".
Incidentally, when I was in New York in the 1970s, most of the song sheets I encountered would be mimeographed typewritten text, and it was common for them to include hand-written annotations to supplement the text: most commonly under-brackets to indicate places where a particular verse would squeeze two syllables in the time normally given to one, or brackets to the left of a pair of line with a 2x[
before them (single repeated lines would often be marked with typewritten (2x)
after. I've not seen such notations elsehwere, so perhaps those were a regional thing. I suspect such things probably work better in settings where most people will know a song, and newcomers who are initially confused can be guided by those who would know the song without the song sheet.