It could be work by a villager, a popular artist, or even the Prime Minister.

But when the hammer goes down the winning bidder won't know exactly what they've bought.

As at this charity auction it's all about the design on the front rather than the name on the back.

The Westhall Parochial Church Council has decided to hold an unusual secret postcard auction to help raise money for the village's St Andrew's Church and East Anglia's Children's Hospices (Each).

Artists and celebrities have been invited to submit a postcard design, with others also welcome to send one in.

They will then be auctioned off and only once they have been bought, will the buyers find out who drew it.

Organiser Karen Kluiters, who lives in the village near Halesworth, said she had seen the auction done before by the RNLI and thought it was a great idea to try locally.

'I thought if they can do it why can't we. I haven't heard of anyone in the local vicinity doing it and we are living in a place with artists coming out of the woodwork,' she said.

Mrs Kluiters sent invitations to a wide range of celebrities and artists asking them to contribute, and was delighted when she received a limited edition copy of a David Cameron sketch, together with his good wishes for their fundraising activities.

'I was shocked, everyone had to calm me down,' she said.

'Initially when I approached David Cameron I thought I'd probably get a polite letter saying he was busy but the next week I got this and thought it was brilliant.'

Other contributions so far include a penguin, wood scene and shells that were drawn by somebody as they flew over Greenland at the end of February – but Mrs Kluiters is keeping tight lipped over the artists behind them and all of the others.

They have also been sent signatures and artworks that are likely to be sold separately after the postcard auction.

Postcards have to be returned by May 31 and will be available for viewing and posted online, with commission bids accepted.

The auction will take place on Sunday, July 22.

For more details, to request a postcard pack to contribute or offer sponsorship visit www.wspa-2012.webs.com