It depends if you think it is OK
which I have to say it doesnt seem like it does...
Is what you signed untrue ? a shift doc - so someone signed you worked 0900-1500 ? and you did ?
then leave it
OR
someone signed you worked 09 00 - 1500 and you would only have signed for 09 30- 1400 (c) ? ONLY then take action
(c) shows that a document which is false has been 'uttered' with an intent to secure payment which wasnt earned
(Fraud - s2. I think )
otherwise put it down to experience
I think yo are being anal about your signature to be honest
this is a do it yourself note on 'agency'
oh yeah but if it comes up in court
there is nothing wrong with 'these facts are true and they are signed for as true'
ah but if they arent true - then see (c)
I have read MMz post about a similar situation
it wasnt a similar situation - see option c
( sig used for things not true)