Done-for-you list cleaning
Free check on your list
How it works

What happens to your file in a pass

You send the list you are about to work. We run it, a person reviews it, and it comes back finished. That is a pass. Every row lands in one of four outcomes. You are not asked to operate anything and there is nothing to set up.

You give

The list you were handed

A CRM export in your own columns, typically 500 to 5,000 rows. Nobody has checked which of it still stands up.

We do

One pass across the whole file

The address, the number, whether the person is still there, and the duplicates nobody has counted. One run of every check.

You get

Seven files and one link

The cleared list in the shape it arrived, and behind it the evidence for every row we acted on, each with the date we checked it.

You become

A team that can answer for the list

The list you did not build goes out as yours, and every row in it has a reason and a date behind it.

00

What we never do

  • We never reach into your systems and change anything, unless you ask us to write back, and then only into fields we add.
  • We propose merges, we never apply them.
  • We never tell you who to contact first.
  • We never put a claim in your file we cannot back.
  • We sell no contact data, so we have nothing riding on how your list looks.

We recommend, you decide. Disagreements are shown, not guessed.

01

The list, in the shape it arrived

Your headers survive in your order. Your own columns are passed through untouched. Empty cells stay empty where nothing was found. Nobody at your end has to put the file back together.

Behind it +

your file is read as a file, column by column, and mapped once. That mapping becomes part of your baseline, so the next list you send is read the same way.

02

What we found, and when

For each contact we could check, we tell you what we found for each way of reaching them, and the date we checked it. An address that accepts mail, an address that does not, a professional profile we could find or could not. Where we can read it, the person's own headline and how long they appear to have been in the role.

Behind it +

the mailbox check is a live check against the receiving mail server, not a guess from a pattern. The role check reads what the person publishes about themselves and quotes it back to you as the evidence.

What it is not: a ranking, a grade or a score. There is no column telling you who to contact first. The evidence and the date are the display, and the judgement stays yours.

03

Duplicates, proposed and never applied

We show you what is the same across two rows, what differs, which of the differences we can settle and which we cannot, and we name the part that is yours to settle, which is usually who owns the record. Nothing is merged unless you say so.

04

The stopped rows

Every row we removed sits in a second file with one line of reasoning against it and the date we checked it. It is the part of the pass you can check against your own knowledge of your own data, one row at a time. If you disagree with a removal, put the row back.

05

The Decision Brief

Some rows cannot be settled by anybody but you.

  • Two people of the same surname at the same organisation and nothing in the row separating them.
  • A mail server set up to accept every address put to it, real or not, so nothing we send it can tell us whether this particular mailbox exists.
  • A person who looks as though they have moved, on evidence that is suggestive rather than conclusive.

Those come back in the Decision Brief, and we take a position on every one of them. A row we held carries what we found, the date, and our recommendation. A row we could not check carries a stated safe default: do nothing, and it stays out of the cleared file. We walk them with you on the call.

If you never open the brief, the default holds: every row in it stays out of the cleared file.

06

The changelog, and the note under your name

Every change and every removal is recorded with the reason and the date, on one page linked from your delivery. There is also a one page note under your own name, ready to forward, to your client or your own team, saying what was checked, what cleared, what was held rather than guessed at and what could not be checked. Our name is not on it and there is nothing to pay for it.

07

Before the file moves

Before we touch a file we agree the terms and take one short written instruction from you: who you are instructing us on behalf of, that you are authorised to do so, what is in the file, what you are asking us to do, and anything in it we must never touch. On the call we agree the other two: where the finished list is going, and how you want the evidence. How we handle data is on our security page.

What comes backseven files and one link

The work comes back finished, with the evidence attached

…_send-ready_v01.csv FILE 1 OF 7

The list, in the shape it arrived

Your columns, in your column order, carrying the rows that passed every check we could complete.

YOUR HEADER ROW, AS YOU SENT IT
CRM IDFirst NameLast NameJob TitleCompany NameWork Emailand the rest of yours
ONE CLEARED ROW
Richard Calloway · Marketing Director · Longmarsh Brook Media Ltd · rcalloway@longmarshbrook.co.uk

2,106 of 2,400 rows cleared.

…_decision-brief_v01.html FILE 4 OF 7

The Decision Brief

The rows we could not settle on our own. Each carries the evidence we read, the position we recommend and a safe default that holds if you do nothing.

Catch-all domain 61
OUR DEFAULT
We could not verify these mailboxes on their own. Our default is to keep them out of the cleared file. Override if you know the contacts.

If you do nothing at all, every row in the brief stays out of your cleared file.

131 items across five categories.

catch-all domain 61duplicate of another row in your file 24mailbox could not be checked 15role or organisation change 19we could not confirm the person 12
…_row-passport_v01.html FILE 7 OF 7

The row passports

One card per row: the verdict it carries, the evidence behind it, and the date we checked. Rows that arrived with neither an email address nor a profile URL carry no card, and the document says how many.

The four behind them: what was checked, what came out, what changed, and the list for your sending tool
…_channel-verdict_v01.csv FILE 2 OF 7

The channel verdict, on every contact

What the checks returned, contact by contact, each with the evidence and the date it was checked.

AS IT ARRIVED
Richard Calloway, Marketing Director, Longmarsh Brook Media Ltd, rcalloway@longmarshbrook.co.uk
WHAT THE CHECK RETURNED
The address accepted mail when it was checked.
DATE CHECKED
2026-07-22
WHERE IT ENDED UP
In your cleared file.

2,400 contacts, each with a verdict and the evidence behind it.

2,106 carry a channel with a dated check, and those are exactly the rows in your cleared file.

…_stopped-rows_v01.csv FILE 3 OF 7

The stopped rows

Every row we removed, with the reason and the date. Put any of them back if you disagree. It is your list.

AS IT ARRIVED
Colin Firth, Communications Manager, Tillingham Point Facilities Ltd, c.firth@tillinghampoint.co.uk
WHAT WE FOUND
Address is flagged for abuse complaints. Sending risks your sender reputation.
DATE CHECKED
2026-07-22
WHERE IT ENDED UP
Removed. It sits in the stopped rows with the reason recorded beside it.

163 removed, each carrying the reason.

…_changelog_v01.csv FILE 5 OF 7

The changelog: what we changed, what we found and left in place, with the reason and the date

Every change, every removal, and every difference we found and left in place. The reason and the date checked.

882 entries, each carrying the reason and the date we checked it.

FILE 6 OF 7

The withheld addresses, in the shape of the destination you name

The addresses kept out of the send, in the shape your sending tool loads.

·Outside the seven, and never counted into them: the Client Note, a one-page note you forward to your own client, under your own name.

The free check runs the email and phone checks across your whole file, and the identity check on up to 1,000 rows.

An example pass. The organisations and people in it are invented and the figures are illustrative, not measured.

The machinery

Four things the pass does that are easy to miss

Account protection

Your own clients, held apart

Tell us which organisations are your own clients and which are competitors, and those rows are kept aside on your instruction, with the reason, out of the list you are about to work.

Where the file carries identity checking, the match runs again afterwards, so somebody who has moved into one of your clients is caught even when the row you sent named a different employer.

The link we find

When a row arrives with no LinkedIn URL, we go looking with the first name, the surname, the role on your row and the work email domain. What comes back is checked against the name, employer and role you sent us. A strong match is written into your file. A middling one is held back for a person to look at, and if nobody can stand it up it is dropped. A weak one is dropped and the rejection is recorded against that row. The cell stays empty rather than carrying a link we cannot back.

Duplicates across files

Duplicates are found against the lists you have sent us before, inside a freshness window, not only inside the file in front of us. A contact you already had comes back named as one you already had.

The wrong-person guard

Where the evidence points to a different person with the same name, the row is held and we report no findings on it at all, rather than reporting findings that belong to somebody else.

Where to start

Send us the client list you trust least and pick a call slot. We run it the day before, email and phone across the whole file and the identity check on up to one thousand rows, and show you three numbers, cleared, removed or held, could not check, and we walk your own rows through with you. No cost, and if nothing in there surprises you we stop.

Send your list

The free check takes one whole file, roughly 500 to 5,000 rows, and the more rows you send the more it will show you.