Last year Novotel Bali Benoa asked my credit card number through email because they only received last four numbers from Accor system.
Then I replied it was unusual request and very insecure to give my credit card number through email.
I told them I would pay the bills when I arrive at the hotel and refused to give my credit card numbers. They complied with my request.
Inconsistent elite member treatment then security issue. Would you stay in Accor chain again ?