Picture somebody discovering in November that work done in March was defective, and beginning at that point to think about what to do. From their perspective the matter has just begun. In fact three or four separate clocks have been running since the spring, set by different bodies for different reasons, and at least one of them may already have expired. Nothing about that is announced, none of the deadlines appear on any document that arrives in November, and the earliest of them is frequently the shortest and the least known.
The Deadline Set by Law
Every state sets time limits for bringing a claim, and they vary by the kind of claim rather than by how serious it is. Contract disputes, property damage, personal injury, and claims against a professional all carry different periods, and a written contract usually carries a longer one than an oral agreement. These are the outer boundary rather than the operative deadline in most disputes, since several shorter clocks generally run inside them. Knowing the outer limit is reassuring and rarely decides anything by itself.
Two features surprise people. The first is that the period runs from a defined event rather than from when somebody got around to being upset, and identifying that event correctly matters more than knowing the number of years. The second is that claims against public bodies are frequently governed by much shorter notice requirements, sometimes measured in months, which sit outside the ordinary limits entirely and are missed constantly by people who assumed they had years.
The Deadlines Written Into a Contract
Contracts routinely set their own limits and these are usually much shorter than anything in statute. A clause requiring written notice of a defect within a specified number of days after discovery, a warranty running for one year from substantial completion, or a requirement to raise a billing objection within thirty days of an invoice are all ordinary terms in ordinary agreements, and every one of them is capable of extinguishing a perfectly good claim on timing alone, without anybody ever reaching the question of who was right.
They are also the deadlines most likely to be missed, because nobody rereads a contract until something has gone wrong, at which point the notice period may already have closed. The habit that prevents this is to read the notice and warranty clauses at signing and write the dates in a calendar, which takes ten minutes at a moment when nobody is stressed. A warranty that expires in June is worth knowing about in May rather than in July.
The Deadlines a Company Sets
The third layer is internal policy, which has no legal force and enormous practical force. A retailer's return window, a card issuer's dispute period, an insurer's requirement to report a loss promptly, a manufacturer's registration requirement: none of these prevents anybody from pursuing a claim elsewhere, and all of them close the easy route. Missing one converts what would have been a fifteen minute resolution into a matter requiring persistence, escalation, and frequently a different remedy altogether.
These deadlines run from an event that may not be the event a customer has in mind. A card dispute period is typically counted from the statement on which a charge appeared rather than from the date a service was supposed to be delivered, which means a charge made in February for work scheduled in July can fall outside the window before the work is even due. Knowing which event starts each clock is more useful than knowing its length.
When the Clock Actually Starts
This is the question that decides most close cases. Some periods run from the date of the act, some from the date the damage occurred, and some from the date a reasonable person would have discovered the problem. The last version, generally called a discovery rule, is why a defect hidden inside a wall may be actionable years later while an obvious one on a visible surface, in plain view since the day the work finished, may not be actionable at all.
What follows practically is that the date of discovery is worth documenting the moment it happens. A dated photograph, an email to a spouse, a note in a calendar, or a message to the contractor asking about it all establish when somebody first knew, and the absence of any such record leaves the question to be argued later from memory. It is a thirty second habit protecting the single fact most likely to be contested.
What to Do When a Deadline Is Close, and the Two Habits That Help
Preserve first and decide afterward. Written notice sent to the right party, dated and delivered in a way that produces evidence, stops most contractual clocks and costs nothing, and it does not commit anybody to pursuing anything. Where a legal limitation period is genuinely near, that is one of the few situations where an hour with an attorney is unambiguously worth buying, because the question is technical, the answer is usually quick, and being wrong about it is final.
Two habits keep almost anybody inside all of these. The first is to write down the date of every significant event as it happens, in one place, with a sentence about what occurred, since the resulting page answers most timing questions instantly. The second is to read the notice, warranty, and dispute clauses of anything signed and put those dates in a calendar at the time of signing, while the document is open and the terms are being read for the only time anybody is likely to read them.
Neither takes more than a few minutes and both are done at moments when nothing is wrong, which is exactly why they get skipped. The person discovering the defect in November is not disadvantaged by having waited. They are disadvantaged by not knowing which clocks started back in March, and by having no record of when they first noticed anything, both of which the two habits above would have supplied for nothing. Both of them are done on ordinary days, which is the only reason they work.