In addition, the Otago Daily Times has been advised by more than one source staff have had to supply basic items, including toilet paper and Milo.
Funding and finance general manager Robert Mackway-Jones said the DHB visited Woodhaugh Rest Home on November 30.
It was not a formal audit, but a site visit, he said.
People had complained about the facility's management; inadequacy of supplies; poor access to supplies; problems with the telephone system; and a lack of response by facility owners and staff to concerns.
"The site visit confirmed adequate supplies were held at the time and there are a number of follow-up actions scheduled with the provider," he said in an email.
An anonymous letter to the Otago Daily Times said the home frequently had insufficient supplies, with staff sometimes having to supply items such as toilet paper.
The rest-home was known as Leith House and Rest Home before being bought by Cressida Healthcare in April last year.
Service and Food Workers Union organiser Ann Galloway said staff were looking forward to the future under a new manager, who was to start in the new year.
Until then staff had been "in limbo".
"The place is running basically because of the goodwill of the staff."
There had been issues with supplies, including food, but she did not believe staff had needed to provide supplies themselves.
Cressida Healthcare general manager Colleen Stairmand, of Auckland, said a new manager, a registered nurse, was already working at the home part time, but would be employed full time from this month. Although in Auckland, Mrs Stairmand was being kept well-informed of the day-to-day running of the home.
The home had had no complaints from residents' family members, and she believed anonymous complaints might be motivated by "disgruntled" people who had "exaggerated" matters.
The rest-home had good supplies, both of food and other items, and there had been no major issues, she said.
The last manager, Beth Sizemore, left on December 9.
Occupancy was slightly down from April last year, when there were up to 45 residents. Now there were 37 residents in the home, which had space for 70.
The drop was mostly because of Christchurch residents leaving, although two residents left when Mrs Sizemore departed, Mrs Stairmand said.
The rest-home would work closely with the DHB to resolve any issues, but it did not involve a particularly high level of oversight.
"I think they come in and want to support us with bits and pieces. I don't think it's an unusual thing."