She told the Herald she thought at first someone was angry at her for parking badly, so she hesitated to read it – but when she did, she found a message of hope from a stranger.
"Your sign saved my life today," it read.
"I left my house with a plan and asked for a sign, any sign I was doing the right thing, when I saw your car in the parking lot. Thank you."
Lacey says her heart "completely dropped" when she read the note, and it made it all feel worth it.
"When I printed [the stickers] I remember thinking that at least one person could be helped by it – 99 per cent of people may see it and think nothing of it, but it was just a tool to let people know that they're not alone. At the time, it feels like it will never get better, and the world feels so dark but it will get better."
She says suicidal people make the choice to stay, every day.
"It's important to say they choose to stay – it's a constant decision every day to stay and I just hope it's a continuous decision, you know. Maybe [the sticker] was a sign they were supposed to see."
In the days since she received the note, Lacey has thought a lot about the person who took it as their sign to stay.
"Whoever left it, I really hope they are okay and I hope they have someone to reach out to and talk to. It helped them but I know it's a constant decision not an immediate one, I wouldn't expect it to be an immediate snap out of it 'I'm going to live' but it can be a step back and an opportunity to reflect.
"You never know who needs it."
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call police immediately on 111.
OR IF YOU NEED TO TALK TO SOMEONE ELSE:
• LIFELINE: 0800 543 354 or 09 5222 999 within Auckland (available 24/7)
• SUICIDE CRISIS HELPLINE: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• YOUTHLINE: 0800 376 633 ,free text 234 or email talk@youthline.co.nz or online chat.
• NEED TO TALK? Free call or text 1737 (available 24/7)
• KIDSLINE: 0800 543 754 (available 24/7)
• WHATSUP: 0800 942 8787 (1pm to 11pm)
• DEPRESSION HELPLINE: 0800 111 757
• SAMARITANS – 0800 726 666.