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SmartCheck

What is worth certifying

Certifying everything is noise. These are the cases where it genuinely matters.

Updated on 13/08/2026

Certifying does one thing: it lets you prove later that something existed and said exactly this on a given date. If nobody will ever dispute that, certifying it adds nothing.

Where it does

DocumentWhat is protected
A delivery or handover noteThat it was delivered that day and in that condition
A technical report or surveyThat it said this before there was a dispute
A design, a formula, source codeThat it was yours on that date
Photos of a site or of damageThat they were taken when you say, not after
An important communicationThat it was sent and what it said

Where it does not

  • Drafts that will change next week.
  • Documents already signed: the signature carries its own date.
  • Copies of third-party official documents, which are verified at source.

Important

Certifying does not say the content is true. It says that content existed on that date. A certified report with invented figures still has invented figures, only with a trusted date.

Worth knowing

The useful question is not "is this important?" but "could anyone dispute in two years what this said or when?". If yes, certify it.

Can I certify something old?

Yes, but the date certified is today's, not the original.

Does it take space or change the document?

The document does not change. What is stored is its fingerprint.

Does it still hold if I convert the file?

No: converting changes it. Certify the file you intend to keep.

A real case

The situation

An engineering practice delivers a report that may end up in litigation.

What you do

  1. Certifies the report on the day it is delivered

What you get

Two years later they can prove what it said before the dispute, without relying on their own filing.

The situation

Everything incoming is sealed and the listing stops being useful.

What you do

  1. Seals what could end up disputed

What you get

The listing says something again.

The situation

An agreement closed by email is not sealed.

What you do

  1. Seals the thread when the agreement closes

What you get

What was agreed can be proved later.

The situation

Drafts that will change are sealed.

What you do

  1. Seals on closing, not during

What you get

Each seal corresponds to something final.

The situation

There is doubt whether to seal a client deliverable.

What you do

  1. Seals it the day it is delivered

What you get

The delivery date stops being argued.

The situation

Something already signed is sealed.

What you do

  1. Checks whether the signature already provides the date

What you get

You do not pay twice for the same thing.

This article answers

  • which documents should i certify
  • when to use smartcheck
  • is it worth sealing every document
  • what is certifying evidence for