Wedding? Wedding with who? With American or Nepali, or other nationality? If it is American, make sure you send his/her copy of passport, marriage license, and if filed for residency, copy of receipt from INS, both of yours verifiable income, how parents will be accomodated here, and bank balance. If wedding with Nepali, everything else with the paper works showing valid status here in the US. I assume you are in the US. I hope someone will add some more on it.