Why are you taking your wallet into the incall?
Here is what you need to take into an incall.
1. The correct donation.
2. If you think you might go over time, enough coin to cover that extra time.
3. If its someone you never met before, I would suggest your hobby phone, just in case.
4. Your car key, meaning ONE key or fob, not the whole key ring.
5. Any gift you may be giving her, like a pack of Newports or a can of Red Bull.
6. A rubber if shes one of those who often forgets them.
That's fucking it! No real life phone, no wallet, no ID, no credit cards, no pictures of your family, no map with detailed directions to your house, nothing. What possible reason would you have to take your wallet with you?