To recharge a cost, there should be 2 elements:
- The purchase invoice (for what you’ve paid out)
- The sales invoice (for what you’re recharging)
In effect, the overall balance should be at least £0.00 or higher (depends if you add a markup of not).
So if you have recharged this to a client (where they pay you back), then a sales invoice would be correct. In fact, we can even help here with our re-billing tool which links back to the original purchases and attach any receipts (if you wish).
I hope that helps?