Question

i want the format of informal letter

Answer 1

address

date 

my dear friend and type friend name
                       your content

your friend
your name
 

Answer 2

date: 24/02/2016
day: Wednesday

From: name,
           address,
           district.

to: the person whom you are going to write the letter,
      address,
       district.

respected sir/ madam,
 
                                    subject: the reason for which you are writing the letter.

the content should be in three paragraph. in the first passage you should Conway  you problems . in the second passage the things related to your letter and at the last with your opinion and requesting the person to consent your problem  .
                                                                               
                                           thank you                                        

                                                                                           your truthfully,           
                                                                                                your name.

Address on the envelop :
                                       the thing you wrote in TO