Hi Matana, UBS is Switzerland's biggest bank (as well on a global level) is 100% trustworthy (I'm based in Switzerland :). Swiss people are used to transfer money directly from their bank account rather than using credit cards, as they feel it's more secure. Your customer will certainly want to have your IBAN number (every person in the world who has an account in a bank has one), that will allow him/her to transfer directly the money to you.
Hope this helps!