I didn't have anyone sign mine but me. I got everything a few weeks later. Including the lapel pin. I'm not sure what the requirements are for the pin. It was the second 250k badge I had qualified for (I got the first badge about 10 years ago), but had only driven both cars about 270k miles myself combined. Not yet 500k kilometers.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)