Clothing giant Gap is not for sale, according to a letter from the company's interim CEO Robert Fisher, which was allegedly circulated to workers.

The New York Post saw a copy of the memo which said Fisher had also issued details on how the firm's problems could be solved.

The memo was reportedly titled 'How we'll be great again' and listed ideas such as allowing creativity to flourish, creating realistic expectations and facing up to mistakes.

Gap's CEO Paul Pressler quit three days ago amid continuing concerns over the company's poor performance.