You wrote £1,650 in the book on the bonnet. They photographed it. You photographed it. In October nobody can read whether the doors were in. They remember £1,400. You remember the doors. That is not a customer from hell. That is a format that cannot survive a fortnight.
Where the money leaks
| Format | What dies |
|---|---|
| Notebook photo | Scope, validity, VAT sentence, your name |
| Notes / messages app | Version control — three totals in one thread |
| Voice note “about two grand” | Any yes they can point at |
| PDF from the same workings | Nothing you actually needed |
The leak is not calligraphy. It is extras you did on Tuesday that never made the page, deposits you cannot prove, and a Sunday retype where you round down to keep the peace.
A Notes quote also trains them to negotiate in the same box. Every new bubble is a new number. A file is a file. Change the job, send a new file.
Your workings can still start in a book. The customer never needed the book. They needed a document they can show a partner and you can clone into an invoice on the drive.
What people miss
“They know me, it’ll be fine.” Until the partner, the surveyor, or the memory disagrees. Paper is for the day it is not fine.
Illegible extras. If they cannot read “incl. 4 doors,” those doors were never in.
Sending the photo compressed. WhatsApp eats handwriting first. A PDF as a document survives.
Retyping on Sunday from the photo. You will drop a line. That line was profit.
Related guides
FAQ
- Is a neat PDF slower?
- Once, when you build the skeleton. After that it is faster than photographing a page and hoping.
- What if I am on a roof?
- Voice the workings, type the PDF when you are down — same day, not Sunday. Do not send the voice note as the quote.
- Can I still write the measure in a book?
- Yes. The book is for you. The quote is for both of you.
- They asked for a ballpark in the chat.
- A range in the chat can be an estimate. The job they accept still needs a file.
