liz&andrew

So are you both currently living in London?
It is fine for your fiance to enter on the Visa Waiver Program to get married, and then return abroad. He may not need to tell them about his plans, but if asked he will have to tell the truth about marrying and so should be prepared to prove that he does just intend to get married and then return abroad. So proof of his job, proof of a lease, etc., may come in handy.
K-3 is designed to be applied for alongside CR-1, and is for when the CR-1 process takes a long time. But nowadays generally both petitions are approved in the same time-frame, and they just ignore the K-3 application and process the CR-1. So that is the route you will go.
If your fiance has savings of over $55,000 then that should do for the support requirement. Otherwise, you will need to find a friend/family member in the US willing to co-sponsor. Alternatively, you will have to return to the US and find a job.

Yes, you can. You can enter the US and get married, leave and apply for a CR-1 Visa. It is only fraud if you enter to get married and NOT LEAVE THE US.
We are not giving "opinions on our experience" we are giving out advice on the laws of immigration. Yes, some experience comes into play, but the nuts and bolts of it are in black and white.
Some countries have different rules when it comes to the Consulate path. People from VWP countries do not have to get visitor visas to come to the US to visit. My husband has visited several times while his CR-1 is in process with no visa and no problems. Remember to give due regard to what country the OP is filing from.

Thanks for clearing the co-sponser part up.
I really do want to reiterate though, you CAN enter the US, on a visa waiver (ie, without a visa), with intent to marryPROVIDED you leave after and dont try to adjust status.
If you enter the US, without a visa (or even on a different visa) with INTENT to marry AND adjust status, that is when you have problems.
Intending to enter and marry is FINE!
Intending to enter, marry and immediately stay is NOT!

amazngrace, most of this information is incorrect.
1) You need a fiance (K1) visa to marry and then immediately reside in the US. If you want to marry and then leave, that is not a problem (I married in the US and am currently awaiting CR-1 completion in England)
2) You do not have to meet the requirements for the last 3 years, I believe it is better if its for the last year, but so long as you have proof of ongoing employment meeting the poverty guideline you should be okay (I know this doesnt apply to you, Liz, but just thought i'd clarify!)

Hi Liz!
In answer to question 1, it is fine to get married in the USA. The problem is when you have intend to marry and then STAY in the USA. Make sure Andrew has a return ticket booked in case of a fussy CBP Officer!
Qu 2: K3 is basically redundant. It ends up turning into a CR-1/IR-1 most of the time, and if it doesnt, ends up taking longer, so your option will be CR-1!
Qu 3: Im a bit iffy in this part, I know that your partners income wont count as that is not going to continue in the US. Assets and Savings do count, but they have to be prety significant to make a difference. Not sure of the exact figures but I believe the Poverty Guideline sheet will help!
You can have a joint sponser, so if you have a family member that may be able to help, it may be worth starting to check out now!
Finally, are you plannign to do DCF? I believe you have to be domiciled in the UK for a certain period of time, so may be worth looking more into that too!
Hope some of this helps!