The problem
A decision in principle should be straightforward. In practice, it is frequently delayed or derailed by avoidable problems: a client who did not know their precise annual income, an address history with a gap, a credit file with an unexpected default they had forgotten about, or a mismatch between the income they declared and what the documents show. Every time something like this happens, the process stalls, the client gets frustrated, and the broker has to spend time fixing a problem that better preparation would have prevented.
The DIP conversation is also a client expectation-setting opportunity that is often missed. Clients frequently arrive with unrealistic expectations about how much they can borrow, how quickly the process will move, or what effect their circumstances will have on lender appetite. A client who expects to borrow £400,000 and is shocked to be offered £260,000 feels let down, even if the advice given was entirely accurate. Managing those expectations up front, with a clear and honest explanation of the factors at play, makes for a smoother client relationship and fewer difficult conversations later.
Most brokers have a rough mental checklist of what clients need to gather before a DIP application. But that checklist lives in their head, gets communicated inconsistently, and is rarely documented in a form the client can actually refer back to. AI makes it easy to turn that expertise into a polished, personalised client guide that sets up the DIP application for success.
The system
Step 1: Generate a personalised DIP preparation checklist (Claude)
Rather than sending every client the same generic list, use Claude to generate a checklist tailored to each client's specific circumstances. The more specific your prompt, the more useful the output.
Prompt example: "I am a mortgage broker preparing a client for a decision in principle application. The client is self-employed as a sole trader, has been trading for 4 years, has a business partner, and is buying jointly with their employed spouse. They have lived at their current address for 18 months and at the previous address for 2 years. Please create a comprehensive preparation checklist for this client covering: documents they need to gather, information they need to have ready, credit file checks they should do in advance, common pitfalls for self-employed applicants, and questions to have answered before we proceed. Use plain English and a friendly, reassuring tone."
Edit the output to match your preferences and remove anything not relevant to your client. The result should be a checklist the client can actually follow, not a generic document full of caveats.
Step 2: Draft a common pitfalls guide for their income type (Claude)
For each major income type (self-employed, contractor, employed, complex income), use Claude to draft a plain-English guide to common DIP pitfalls. These can be built once and reused.
Prompt example: "Please write a short guide for self-employed mortgage applicants on the most common reasons their decision in principle might be declined or delayed, and what they can do to prevent each one. Include: income documentation issues, credit file problems, gaps in address or employment history, undisclosed commitments, and anything else commonly missed. Write for a non-financial audience in plain English. UK context throughout."
Step 3: Create a visual client briefing (Gamma)
For clients who respond better to visual explanations, use Gamma to turn the checklist and pitfalls guide into a clean, professional slide deck or one-pager. Gamma generates presentations from a text prompt, so you can feed it your Claude output and get a formatted visual document quickly.
Prompt example for Gamma: "Create a short client guide presentation called 'Getting Ready for Your Mortgage Decision in Principle'. Use the following content to build five slides covering: what a DIP is and why it matters, documents you will need, checking your credit file, common mistakes to avoid, and what happens next. [Paste your Claude content]"
The resulting slide deck can be shared as a PDF or via a link, and is much more engaging than a plain email with a list of instructions.
Step 4: Follow up after the DIP (Claude)
Once the DIP is submitted, use Claude to quickly draft a personalised follow-up email explaining the outcome, what it means, and the next steps.
Prompt example: "Please draft a client follow-up email for the following scenario: the DIP has been approved at £[amount]. The client is a first-time buyer. The next step is to find a suitable property. Please explain what the DIP means, how long it is valid for, what happens when they find a property, and what they should and should not do during the mortgage search period (e.g. avoid new credit applications). Friendly, reassuring tone."
The results
Before: DIP preparation communication was ad hoc, usually a quick verbal rundown in a meeting or a brief email. Clients regularly arrived at the application stage without key documents, or with credit file surprises that caused delays. The broker spent an estimated one to two hours per week chasing missing information or explaining problems that better preparation would have prevented.
After: Every client receives a personalised preparation pack before the DIP application is submitted. Document requests are clearer, clients are better prepared, and the proportion of applications that proceed smoothly on first submission has improved noticeably. Clients regularly comment that the preparation guide was one of the most useful things the broker sent them, which is a simple and genuine differentiator in a competitive market.