Originally Posted by craigthemif

I've had Hertz insist that they sent the miles to my M&S account, only for TK to insist that they were never received.

I've learned that the only way to get TK miles properly is to use the TK specific car rental websites during interesting bonus mile promotions. Otherwise I credit car rentals elsewhere and use cashback websites as normal, even though I often would prefer to earn TK miles...