SAN FRANCISCO (NBC News) - A person who claims to have made a fortune flipping homes is now hiding money all over the San Francisco area and using Twitter to send out tips on how to find the cash.

The person uses the Twitter account
. Several people claim to have found $100 or $200 in envelopes signed "With Love, @hiddencash."

The Bold Italic, a San Francisco-based online magazine, reported receiving a tip from an anonymous person saying they have launched a campaign hiding cash all over the city.

"This will continue indefinitely. There is nothing commercial behind this. It is a social experiment," the tipster wrote to the Bold Italic.

The person behind the campaign told the Huffington Post, “I am OK with giving out at least $1,000 a day for the foreseeable future … We are planning to add more cities, starting with LA next weekend and NYC shortly afterwards.”

He or she plans to start a nationwide movement around anonymous charitable giving.