A seller says the windows were replaced, but the document folder contains only a quotation. That is a reason to trace the installation records, not immediate proof that the windows are defective or that the sale cannot proceed.
For relevant work in England and Wales, FENSA certification is one route used to document compliance. The scheme’s certificate guidance explains what its certificate records. It is important to identify the installation date and the route used at the time: absence from one scheme’s database is not a complete history of the property.
Build a small evidence trail
Start with the address, approximate completion date, installer and exact work. Were all windows replaced together, or were front and rear elevations done in different years? Was the item a replacement window, an extension project or a later repair? Keep those questions separate rather than assuming one certificate must cover everything visible today.
As an example, a homeowner may have an invoice for four upstairs windows and a later receipt for a patio door. A certificate found for the first job should not quietly become evidence for the second. A simple two-row list makes the missing item easier for the conveyancer to investigate.
FENSA provides a replacement-certificate route when a record exists but the paper has gone missing. Check the address and work details against the document that is returned.
Leave the legal remedy to the conveyancer
Ask the conveyancer what evidence is required for this transaction and whether another competent-person scheme or building-control record is relevant. Do not buy an insurance product or contact authorities simply because an online checklist says to do so; the appropriate sequence can depend on the circumstances.
Documentation and current condition are also different questions. A certificate does not replace inspecting opening mechanisms, glass, seals or ventilation, while a neat-looking frame does not establish its paperwork. Keeping both tracks visible helps a buyer request the right information without turning an incomplete folder into an unsupported diagnosis.