Record the result of the visit
Distinguish what was requested, what the provider did, and what still needs attention. “Washer inspected; part ordered; provider will call after delivery” makes the next task clear. “Washer done” can hide an entire return visit that nobody is now watching for.
Choose the next date from the right rule
Keep the invoice or service note beside the entry if you need it for future questions. When a task truly finishes, check what sets the next due date. A fixed calendar inspection can retain its usual date. A service explicitly due twelve months after completion should use the completed visit date.
A service agreement may use a fixed annual date; another task may be due a stated interval after the actual completed work. Write which rule applies and where it came from. A visit postponed from May to June should not automatically shift every later reminder unless that is how the interval works.
Leave evidence someone else can find
Keep the service note, invoice, or ticket number beside the date and equipment name. If another household member needs to follow up, give them the promised action and relevant contact route. Remove the open task only when that action is finished or a separate named owner has accepted it. This prevents a tidy list from concealing incomplete work.