The defendant's first argument in every New York fall case is "we didn't know." Beating it takes one of three showings:
- The owner created the condition — an employee mopped and left no sign, a display was stacked to fall.
- Actual notice — a complaint logged, a work order opened, a prior incident at the same spot.
- Constructive notice — the hazard existed long enough that reasonable inspection would have found it. Dirty, tracked-through liquid tells a time story; so do inspection logs with convenient gaps.
The evidence that proves notice is the evidence that disappears fastest: surveillance footage (often overwritten within days), sweep logs, incident reports. A preservation letter in the first week routinely decides these cases. Photographs of the exact condition — the liquid, the broken step, the missing handrail, with something for scale — taken before the store cleans it up are worth more than any witness.