St Vincent de Paul Goulburn assistant secretary Ruth Vial said it has been happening since Christmas. 

"It has been happening for months - since they closed the donation bin" Mrs Vial said. 

"After Christmas, it was really bad with people throwing stuff out.

"It started again last week. Last Wednesday there was so much stuff there that we could not fit it in the two red waste bins so the men from the shop had to come down and put it in the truck and then take it to the dump and we had to pay to dispose of it, though we are a charity.

"We still have to pay that fee - so it is costing us money to get rid of it. It is one of the worst loads we have had."

She said there was a mixture of dirty clothes, underwear, shoes and even grass clippings among the laneway rubbish. 

She said the donation bins for St Vincent de Paul is behind Centrelink. 

There is also a bin out the front of the store in Auburn Street. 

"This is not stuff to donate - this is just rubbish," she said.

"To avoid the build-up, we are talking to our head office in Canberra to see if we can close the doorways off in the laneway with a gate or something - that can be opened from the inside because they are fire exits."

"The council wont do anything because they said it is our property. They also said the signage is too small, but will not assist us with replacing it. What other business premises has to do that?"

She said part of the problem was where they are located, with people just driving up and dumping. 

She said the Salvation Army has been having similar problems with rubbish being left outside the premises, because they have a back lane. 

"We are asking people to take responsibility and not leave their rubbish here at all," she said. 

"This is not a rubbish dump.

"If they have good things leave them at the shop - if they don't have good things - take them to the garbage tip."

"We want to bring people's attention to it and get them to stop it.

Assistant treasurer Gary Groves said it is a common problem for charities.

"They face the same problem in Canberra, particularly over Christmas," he said.