# Why a customer from years ago still belongs in your files [Home](https://theonlyaxelj.com/en) › [Study](https://theonlyaxelj.com/en/study) › [Articles](https://theonlyaxelj.com/en/study/articles) author: [Axel Jedlitschka](https://theonlyaxelj.com/en/about) published: 2026-10-13 updated: 2026-10-13 language: en reading time: 5 min topic: Marketing & sales source booklet: [The Second Sale](https://theonlyaxelj.com/en/shop/introduction/second-sale) A customer who bought from you four years ago is still in your files. What fades with time is the contact, when nobody looks after it. A working customer file is built from four smaller files, and each one answers a single question. Everyone who bought from you stays in them for years, until they die, ask to be taken off the list, or move without leaving an address. ## One pile or four files When an owner finally decides to keep a customer file, the natural move is to open one document and pour everything into it: the phone number, what the customer bought, the ages of the kids, how they like to be spoken to. The source splits the information into four separate files, and each file has its own job. The reason is speed. When you need a phone number, you don't want to wade through a purchase history to find it. Suppose a renovation contractor keeps one long note on each customer's card, with the phone number, the kitchen measurements and what the customer's wife thought about the color. Before a morning meeting, he scans three paragraphs to find ten digits. Or take an esthetician who keeps a client card at the clinic, with sensitivities and past treatments, and a separate contact list on her phone with the number and the birthday. When a client calls, she opens both side by side. Neither one is buried inside the other. ## Four files, four questions The master file answers how you find this customer and reach them. It holds the name, the address, the phone number and other basic data, and the source keeps it short on purpose. The personal details file answers a different question: who this person is beyond the sale. Suppose an event photography studio writes down that both partners in a couple are teachers and that they have a dog. That detail won't help close a deal today. A year from now it helps you hold a conversation that doesn't sound like a call to a stranger. The third file covers how to approach this customer. It holds what you can't keep in your head, and the source says plainly that nobody can remember all of it. A garage might note that one customer rushes in the mornings and would rather get a quick phone call than a long text message, and then adjust to that on every contact. The fourth file covers the next commercial step. It records the last sale in detail, along with the preferences the customer has already shown. Suppose a design studio notes that a client bought business cards and a logo and turned down a website proposal for the time being. The studio won't pitch the website again a month later as if the topic never came up. ## No file is ever too old Here is the part that turns a filing habit into an asset. When a customer hasn't bought in a long time, it's easy to decide they're no longer relevant. The source says the opposite: there is no valid age for a customer file. It names only three situations that remove someone. The person has died, the person has asked to come off the list, or the person has moved and left no address change behind. A purchase four years ago is not on that list. The sense that a customer has gone cold is the owner's feeling, and nothing in the file backs it up. Once you see it that way, the time since the last purchase stops being a reason to give up on anyone. ## What happens to a list nobody touches This matters because contact gets lost faster than it seems, and it gets lost quietly. The source explains that the post office keeps a change-of-address card for only six months. Then it gives a case. A company had a list of 40,000 names and failed to mail to it two or three times a year. It lost 27,000 of those names, because people moved, the address change got thrown away at the post office, and nobody could be reached anymore. That is close to seventy percent of an entire list. None of those customers had aged out. The relationship had gone stale, because nobody tended it. A file you keep working stays useful for years, and a file you leave alone shrinks without anyone noticing. Suppose an insurance agent has 900 open policies and treats anyone who hasn't called in three years as a dormant customer who isn't worth the time. When he finally checks, he finds that 40 of them have moved to a competitor. Nobody offered them anything better. Nobody called to renew. Or suppose a physical therapist clears out of his mailing list everyone who hasn't booked a session in over a year, assuming they no longer need treatment. Some of them moved to another city and kept looking for similar care. Had they stayed on the list, they would have welcomed his recommendation of a therapist they could trust near their new home. ## What the booklet has on this In The Second Sale, this chapter ends with two short exercises: the four files, and the dormant list. The chapter before it explains why customers who already paid you are your biggest asset. The chapter after it covers what to do with a file in the moments before you reach out. A customer who bought from you years ago still belongs in your file, as long as you still have a way to reach them. - [The Second Sale](https://theonlyaxelj.com/en/shop/introduction/second-sale): The question “how do I bring in customers” turns from a question about advertising into a question about record-keeping and asking. --- [עברית](https://theonlyaxelj.com/he/study/articles/no-customer-file-is-too-old) · [Español](https://theonlyaxelj.com/es/study/articles/no-customer-file-is-too-old)