Myrtleford Hospital Op Shop (MHOS) is set to install security cameras to deter people from using their site as a rubbish dump.

MHOS president, Lorraine Piazza, said two recent 'donations' left for volunteers, one of which was left out in the rain all night, were made up completely of rubbish.

"Everything from these dump loads went in the bin...there was nothing of use at all," she said.

"The clothes were filthy, the shoes were totally worn out and way beyond repair."

Ms Piazza said the main problem is the amount of rubbish being left on the premises.

She said un-sellable items or outright rubbish fills up the MHOS skip bin faster and causes proceeds to go towards rubbish disposal as opposed to a local charity.

"It's the cost to us to remove it," she said.

"We try to raise money for the Myrtleford community and the hospital, but we can't if we're spending the money on taking other people's rubbish to the tip.

"I'm sure dumping is an issue at other op shops, but we're hoping if we put in the new camera, people will be inclined to stop dumping."

Items unable to be donated to the MHOS include electrical goods, furniture of any kind, and broken or damaged items.

Second-hand clothes must be in good condition to be donated.

The MHOS is closed on Sundays and Mondays, but open 10am to 4pm from Tuesdays to Fridays and 10am to 1pm on Saturdays, for volunteers to accept donations in person and for visitors to find something to add to their homes or turn into a gift.