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Legal

Onboarding a new client at a firm

Identification, conflict check and written engagement, before any work starts.

Updated on 13/08/2026

Client onboarding at a firm is often handled with a phone call and a new folder. It is the moment three separate obligations are taken on, and all three are far cheaper to meet before starting than after.

The three things to close

FrontWhat you needWhy beforehand
IdentificationID document, beneficial ownership for companiesStarting work without it is already a breach
Conflict of interestA check against your client baseAfterwards it means resigning the engagement
Written engagementScope, fees and what is excludedIt is what prevents the argument at the end

Important

The second costs most when skipped. Discovering three months in that you act for the other side in another matter is not fixed with an apology: it is fixed by resigning the engagement, sometimes both.

How to do it without slowing intake

  1. 1

    One onboarding process for everyone

    Asking the same things every time, so nobody decides ad hoc what to request.

  2. 2

    Documents supplied by the client, not chased by you

    Send a request and they upload theirs; the work is shared.

  3. 3

    The conflict check, recorded

    Doing it is not enough: you must be able to show it was done and when.

  4. 4

    And the engagement signed before the first action

    Signed from a phone the same day, not a PDF returning in two weeks.

Watch out

The urgent case is what breaks the system: a client arriving with a deadline the day after tomorrow. Decide calmly what minimum is non-negotiable even then — usually identification and conflict — and what can be completed within 48 hours.

What you must be able to show years later

Worth knowing

The last point is always forgotten. Identification is not a one-off: in long relationships it must be refreshed, and a company can change beneficial owner without telling you.

Does it apply to small private clients?

The obligation depends on the type of service, not the client's size.

What if the client refuses to identify?

That is grounds not to accept, and it should be recorded.

Can the client upload their own documents?

Yes, by their link, with no account and without their documents circulating by email.

A real case

The situation

A firm takes on an urgent matter and completes identification three weeks later.

What you do

  1. Defines a non-negotiable minimum for urgent cases
  2. Sends the document request to the client the same day

What you get

Urgent onboardings close within 48 hours with the conflict check recorded.

The situation

A client is accepted and their documentation arrives months later.

What you do

  1. Requests what is needed before starting

What you get

The engagement starts complete.

The situation

Each person asks for different things at onboarding.

What you do

  1. Uses one onboarding template

What you get

The files are comparable.

The situation

An onboarding document expires and nobody reviews it.

What you do

  1. Records validity on receipt

What you get

The file stays true.

The situation

There is no record of what was checked on accepting the client.

What you do

  1. Records the checks performed

What you get

The decision to accept is explicable.

The situation

An old client never went through the current onboarding.

What you do

  1. Checks what is missing in the older files

What you get

The gap closes without waiting for a review.

This article answers

  • client onboarding at a law firm
  • client identification anti money laundering
  • engagement letter
  • checking conflicts of interest