In process serving, it is not enough to say that documents were sent or handed over. In many matters, the real question is whether service can be proved clearly, accurately, and in the correct format if the court or the other party later challenges it. That is why proof of service matters so much in litigation, debt recovery, insolvency, and other contentious work. Under CPR Part 6, service is governed by detailed rules, and Form N215 remains the official civil court certificate of service.
Professional clients often use the terms certificate of service, statement of service, witness statement, and affidavit of service interchangeably. In practice, they are not always the same thing. They serve related purposes, but they do so in different ways, and the format required may depend on the rules, the type of document, the court, or a specific order in the case. Practice Direction 32 states that evidence at hearings other than trial should normally be given by witness statement, while also recognising the continued use of affidavits in appropriate circumstances.
This guide explains the practical differences between a certificate of service, a witness statement of service, and an affidavit of service, and why choosing the right proof matters for solicitors, creditors, insolvency practitioners, and other professional clients.