"Could those of you who kindly donate please be mindful that we are a children's charity and as such we have a range of ages on our wonderful volunteer team," the statement reads.
"We therefore ask that you refrain from donating your used and unused marital aids! We would like to remind you that the branch has CCTV so that these items can be traced back to their owners. Thank you."
A representative for the charity store said the statement came after some recent inappropriate donations.
"We're always hugely appreciative of donations from the community -- but it's fair to say that these items aren't quite the sorts of toys we're looking for," the spokesperson told Wales Online.
The representative said the store is particularly in need of donations of clothing and children's toys.
