E: 11/03 Win a bouquet x 4 (FB C)

*KatieL*

http://your.asda.com/news-and-blogs/mother-s-day-flowers?

All you need to do is tell us which bouquet is your favourite by leaving a comment on our Mother’s Day Flowers Facebook post and enter your details in the form below to be in with a chance of winning.
We’ll pick four winners at random to win one bouquet each to be delivered on Mother’s Day. Please enter the address you’d like the flowers to be delivered to, and the personal message you’d like to include (max. 160 characters) in the form below. Make sure you get your entry in before 11th March – see full terms and conditions.

2013yearofthehouse

Sorry, potentially a silly question, but how can they tell which entry forms match which Facebook posts? Do they get your email address from Facebook and match it to the one on the form? Or can they tell by IP address or something else? Or do they just use the entry forms to pick 4 winners who don't necessarily win the same bouquet that they have posted as their favourite (and it's just assumed that those who fill out the form have also posted). The form asks for who you want the flowers sending to, so if you put your mum's name then obviously it won't match the names used to post a message on Facebook.