"I do a bit of work for free, like cleaning people's jewellery or little fixes and ask them to put something in the Hospice box. A week or so before a customer had put that $50 note in there," he said.
After the man and woman had left he had noticed the box gone and checked the closed-circuit television (CCTV) footage. Mr Haywood has sent the CCTV images to business contacts and put them up on Facebook.
North Haven Hospice funding development and communications manager Hannah Blake said it was hard enough for the organisation, which provides palliative care, to compete for the limited charity dollar available without the theft of donations.
"We rely on every dollar we get. Every dollar is really precious and keeps the services we offer free and those boxes provide about $7500 a year," Ms Blake said. "It's disheartening when this happens. The vast majority of people support us, but it's sad there is a small minority who are prepared to do this."
A police spokeswoman urged anybody who knew the man or woman to contact Whangarei police on 09 4304500 or anonymously CrimeStoppers on 0800 555 111.