By the time it closed, it looked like it came from a conversation.

When a deal closes after eighteen months of conversation, everybody involved remembers the conversation and nobody remembers the webinar, the introduction or the search that started it.

The CRM reflects that: the record is rich in recent activity and thin on how it began, because the beginning was the least interesting part at the time.

Joining the won deal back to the original lead file recovers the origin from data rather than from memory, and memory is reliably wrong about this.

The most common correction is that a channel everybody had written off as ineffective turns out to have started a large share of the relationships that later paid.

That is not a small finding when the channel in question is about to be cut for producing no attributable revenue.

Professional firms win work through people who vouch for them, and the effort behind that — events, memberships, hospitality, content, time — is a genuine budget line.

Because it produces no click and no invoice from a platform, it is absent from the marketing report while consuming a meaningful share of the marketing effort.

Recording the referrer at first contact makes it a source like any other, ranked on the same closed revenue.

Firms that do this usually find the ranking supports what the partners already believed, with one or two surprises that change where the year's effort goes.

The surprises are the return on the exercise; the confirmations are what make the report trusted.

Copper's whole premise is that the relationship lives in email, which means the email address on a record is nearly always current and correct.

That makes it an unusually reliable join key — better than a phone number, which is the reverse of most of this catalogue.

Where a person has changed employer, the same individual can appear twice with different addresses, and the report shows both rather than silently merging them.

Deciding whether those are one relationship or two is a judgement about your business, and the report leaves it to you with the evidence in front of you.

Merging them automatically would be the kind of quiet assumption that makes an attribution number impossible to defend.

For consultancies, agencies and professional services, the interval between a first conversation and a signed engagement is frequently measured in seasons.

A twelve-month file therefore reports on marketing that ran before the file starts, and the ranking it produces is about a period nobody can act on.

Grouping revenue by when the contact first appeared, rather than when the deal closed, puts each win against the effort that actually produced it.

The report also gives that interval per source, which tells you which channels can be turned on for this year and which are next year's work.