Upload Client Addresses
Export your client address list from your CRM or DIP system as a CSV and upload it to Semilariti.
ML Matching
Semilariti standardises every address and matches it to its authoritative UPRN using ML — correcting typos and formatting inconsistencies automatically.
Download Clean Data
Receive a clean, UPRN-matched address file ready to use in your submission workflow.
Fewer Submission Rejections
Standardised, UPRN-matched addresses reduce the risk of lender system mismatches that trigger referrals or rejections.
Faster Processing
Clean address data moves through lender systems more smoothly — reducing the back-and-forth that slows down completions.
Bulk Processing
Process an entire pipeline of client addresses in one upload — not one by one.
GDPR Compliant
Zero data retention. Client address data is processed and immediately discarded.
Why Lender Systems Reject Address Data
Mortgage lenders use automated processing systems that match the application address against their own reference data — or directly against AddressBase — to confirm that the property can be identified. When the submitted address does not match, the system flags it for manual review or rejects the application. The mismatches that trigger these flags are often very small. A postcode with a transposed digit. A street name abbreviated differently from the way it appears in AddressBase. A flat number formatted as "Flat 3" in one system and "3" in another. None of these differences changes which property is being referred to, but they are enough to break automated matching. Lenders do not fix these problems on behalf of brokers. The application goes into a referral queue, and the broker is asked to resubmit with the corrected address. This costs time — sometimes days in busy processing periods — and adds friction to the completion process for a client who may already be under pressure. Verifying and standardising address data before submission is the simplest way to prevent it. It takes minutes using Semilariti.What "Standardised" Means for a Mortgage Address
When lenders refer to a standardised address, they mean an address formatted to match the BS7666 standard — the national standard for UK address data, which defines how each component of an address should be expressed, ordered, and abbreviated. In practice, the most important elements are the building name or number, the street name in its full form rather than abbreviated, the town, and the postcode — all correctly spaced and capitalised. Where a property is a flat or unit within a larger building, the sub-unit identifier needs to follow a consistent format as well. Semilariti's output follows BS7666 formatting automatically. When you download your processed address file, every address is in the standard form that lender systems expect — full street name, correct postcode, UPRN assigned. There is no reformatting step required before you use the data.Protecting Client Data During Address Verification
When you upload a client address list to Semilariti, you are submitting personal data — the home addresses of individuals who have provided that information as part of a financial services process. How that data is handled matters, and you need to be confident it meets the same standards you apply to client information in every other part of your business. Semilariti operates a zero data retention policy. Client address data is processed to perform the matching and then immediately discarded. Nothing is stored on Semilariti's infrastructure after the job is complete. Your data is never shared with third parties, never used for any other purpose, and never retained beyond the processing window. This means using Semilariti does not create a new data retention or sharing obligation. The processing is GDPR-compliant, and no special data sharing agreement is required beyond the standard terms of service. For brokers operating under their own data protection policy, it is a straightforward arrangement that fits within existing compliance frameworks rather than adding complexity to them.