A practical guide to the mistakes that cause delays, rework, and awkward client conversations, plus the checks that keep the certificate clear and complete.
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Written and reviewed by Andrew Moore, founder of Elec-Mate, against BS 7671:2018+A4:2026, IET Guidance Note 3 and the IET On-Site Guide.
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UK electricians
“Replaced three separate apps with Elec-Mate. Certs, quotes, and scheduling all in one place.”
Daniel Palmer — DP Electrical
One of the biggest mistakes is using a Minor Works certificate when the job was not a minor alteration. If the work added a new circuit or needed a different certificate type, the paperwork should match the actual work, not the convenient form that happens to be open.
If you are unsure which certificate is right, when an EIC is required is a useful companion page before you finish the paperwork.
Every key change in the 2026 amendment on one page. AFDDs, TN-C-S protection, new schedule columns, model forms. Pinned on your van dash.
A good certificate should still make sense months after the visit. Keep the description simple, specific, and tied to the actual alteration so the job can be understood without guesswork.
Another common mistake is entering readings without checking they belong to the circuit that was worked on. A Minor Works certificate should show the results that support the work completed, not a loose collection of readings copied from another job.
If the report includes supporting results or a follow-up record, schedule of test results is a good page to read alongside this one.
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The certificate should not be left half-finished because the job is done and everyone wants to move on. The client needs a clean copy, the work needs to be traceable, and any recommendations should be clear enough to act on. If there is remedial work to quote, the certificate and quote should line up with each other.
If the minor works uncovered extra problems, send the certificate and the follow-up quote together. That keeps the conversation clear and helps the client understand what has been completed and what still needs attention.
Most certificate errors come from doing the form in a rush or from rewriting the same job twice. A mobile-first workflow makes it easier to capture the details on site, check the readings once, and export the finished certificate without losing track of the job.
If the job is heading into remedials or a larger inspection, it can also help to move straight into EICR certificate handling or back into your electrical quoting app so the next step is clear.
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“Replaced three separate apps with Elec-Mate. Certs, quotes, and scheduling all in one place.”
Daniel Palmer
Sole Trader · DP Electrical
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Elec-Mate helps keep the details, readings, and export together so the paperwork is easier to complete, review, and send.
“Replaced three separate apps with Elec-Mate. Certs, quotes, and scheduling all in one place.”
Daniel Palmer, DP Electrical
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