Genuinely don't know the answer here, so will be happy to be told I'm wrong..
DH works 50% time at home, and has company credit card which he uses to buy the stationery, printer ink etc that he uses here in his little office.
He's out of ink, and has asked me to go into town to get the cartridges, using his card and pin. I said no, as to me it doesn't seem right, and what if the assistant challenged me - not that anyone ever looks at the name on the card, but it would be just my luck if they did! He's got the hump with me now (it's not the first time I've said no to this type of request).
So, am I being unreasonable, or is it legal and I'm wrong to think I can't use it?