We are about to buy a used car, from someone we know vaguely (luckily)
This afternoon he gave me the V5 to use to arrange insurance, but between my car & the computer it has vanished into thin air

I knew there's a bit he was supposed to send off, but he didn't, & insisted on me bringing the whole thing away. It should turn up - I know it's here somewhere (but my house is awfully untidy...)
If it doesn't, can I just contact DVLC without his say-so to get a new one? (I mean I could have nicked the car!!!) Or should I sheepishly own up & lumber him with getting a new one which I will then fill in & send off for transfer? (I'll pay the fee, obv)