Urgent query internation trade

Hello Frnds,

  i would like to ask if buyer pay to you directly in your bank ac and he want to ship goods in india from where his container goes every week so is there any problem to make clear payment from bank

how to make invoice as the costumer is from UK and he paid directly to bank ac but he wants to send goods mumbai so can you plese advise what document require and what is the procedure?

thank you