I don't know what is the fastest and best way to go. My fiance is living with me in the US on the Visa waiver program from Denmark and will be going back home mid April. This is the 3rd time he has come here and each time has stayed 3 months. We were going to marry in Denmark in January and have the Visa processed there but we ran out of time due to some of the requirements Denmark imposes for marriage. So we returned to the US. My questions are from everyone that knows are:

If we get married here in the US and I apply for the K3 visa, do I have to change my name for the sake of getting a quicker approval? (I don't want to change my name)

Will a K1 visa be quicker to obtain than the K3?

I will probably be moving during the application process. Will submitting a change of address hang things up?

Im not sure what the best and fastest option is, as I haven't started my application process myself. But I am going the K-3 way and I will be changing my ID's and whatnot to include my married name. I don't think it's a requirement, I don't think it will speed things up, but I think it's a nice way to show that my marriage is legitimate as I cannot live with my husband until we get a Visa.

As for changing addresses, I will be moving also during that time. Just ensure that you notify those involved in your application of your new address... whereever your petition is being processed... wether it be USCIS or the Embassy

Just my 2 cents

Changing your name has nothing to do with a faster approval. You change your name if you want to, if not, that is still ok.

As far as a K-1 vs. a K-3, I strongly recommend for you to check out people who have similar timelines for CSC to see what the average time for approvals is. I think for CSC, they're about the same, 6-7 months.

I just want to put in a word of caution based on my own personal experience. My husband was in the United States under a visa waiver program and kept "renewing" it after 90 days. This time he came to the country (after we were married and submitted our I-130 etc.) he was almost denied entry into the United States. The Immigrations Officer told us that technically he should put my husband on the first plane back home but decided to let my husband into the country.

If your significant other does try to enter the US while undergoing this immigration process, bring TONS of proof that they will be going back to Denmark or else you might end up wasting a plane ticket.

My fiance has already been through the horrors of being almost turned back on his last visit prior to this one. Immigration held him for 2 hours in Atlanta and flagged his passport. Before his visit we were told by an uscis official that technically he could enter the US 4 times a year on the Visa waiver program. In all reality this is not true. Immigration officials have sovereign power and can use any excuse to turn away a visitor. Fortunately this last entry was a breeze to enter but we were still in knots wondering if he would get denied. We do not want to deal with this type of Visa any longer. Plus we both agree that we want to live together as husband and wife and traveling back and forth is no longer fun.
Thanks for sharing your experience

I would think that, if anything, changing your name will slow the process down a little, because they have to do full checks on each and every name you list....