Thanksto everyone who commented.
We've considered all the suggestions and come up with the following solution:1. The client will keep business records in two boxes. One to be stored permanently in the van (for purchase and payment receipts and invoices), the other will be kept at home (for bank statements, bills, etc). This way "filing" gets done instantly and nothing will be lost.2. He will buy a triplicate invoice and receipts book from Staples. One copy will go to the builder's clients, the other - to his accountants, and the third will be kept for his own records.3. Every month he will bring all his paperwork to us. This will allow us to ask questions about the transactions that are still fresh in the client's head. Also, we'll be able to adjust the record keeping system according to how easy or difficult he will find this exercise.4. The client will order stamps and stationary with his details. This way he will not have to write his name and contact details every time he gives somebody a quote, invoice or a payment receipt.
Let's just hope he finds it easy enough to do it every day. I will let you know how he gets on in 2 months time.
Once again, many thanks to everyone for your helpful advice.
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