Regarding the creation of new suppliers. It’s common practice to create some generic (catch all) suppliers, e.g.
- Generic Fuel (For business related fuel)
- Generic UK Travel
- Generic Overseas Travel
- Generic Postage
etc…
This is more effective and creates less clutter than creating a supplier record for every single expense, especially when you know you will never use that given supplier again.
You can also drop the actual supplier name into the description field on the invoice if you like and attach the receipt.