How many times have we shared this wish with our students because the quality of work and/or the effort is lacking. I no longer say this to my students, I simply attach this slip to their work and return it to them to correct. The slip clearly shows why the work is being returned, giving students valuable feedback on what good work looks like.
In my class, any work that is returned with this slip is only worth half credit until it is returned with the problem fixed. :)