Requirements:

DNI if you are Peruvian or Passport if you are a Foreigner. £ 0.64

If you want to do it by post you need a certificate from the local Police or your G.P. declaring that he/she saw you personally and it must contain the following information about the applicant: age, marital status, occupation, number of the I.D. used and address. You can send a photocopy of your identification document and a postal order for £ 0.64.