Google Places

We use Google Places to handle locations.

Using their SDK, you can implement an autocomplete for addresses very easily, as well as (optionally) show a preview of the result on a map.

By using the IDs returned by Google, we are able to ensure the location is correct.

Their documentation can be found here. Specifically, Autocomplete may be of interest, where you make sure to include at least place_id as a field to be returned, as this is the value you need to send to us.