Question

letter on complaint to the post master stating that a letter duly posted by you has not reached the recipient even after a month

Answer 1

i do not knot please sorry

Answer 2

Hey mate! U can use following value points:
Firstly, mention the purpose of ur letter
Then, explain ur problem
Explain the solution regarding this( about what post master should do)
thank him for his help.
Hope it may help u..
Pls mark brainielist