What are undertakings between solicitors on completion day? — Property Passport UK guide
Legal & Tenure

What are undertakings between solicitors on completion day?

Professional undertakings that move money and Documents in a set order so completion happens safely when the chain depends on trust between firms.

Published: 18 Apr 2026 · Updated: 18 Apr 2026 · 9 min read

Property Passport UK

See this information for your own home

Free address search across England and Wales. No account needed.

19.4 million searchable properties. EPC, flood risk, sold prices, planning, and more in one structured record per home.

Summary

Undertakings are formal promises between regulated firms about sending money, using it only for stated purposes, and forwarding signed Documents so completion can complete in order.

What to do next

Write down questions as they arise and share them in one message thread with your solicitor to reduce ambiguity.

Property Passport

Permissioned sharing reduces duplicate email chases during a transaction.

Using Property Passport UK

Start from the address on [Property Search](/search). When you own or manage the home, [claim your Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.

Search any property in England & Wales

EPC ratings, flood risk, sold prices, and planning data — free, instant, no login required.