The space provided for rating validation on the licence is so small I haven't bothered. I just squeeze my number and initials in the relevant boxes.
People used to have a stamp made up for log books but that seems to have gone by the wayside, too. I just sign and number the relevant line in a logbook.
For certifying documents, I have a Word document ready into which I insert the relevant details, then print it out and guillotine it to a small enough size so that I can scan it and the document to a .pdf for sending off to the Belgrano.
Seems to satisfy them.
TOO