careful this is not a family Airbnb but a large financial company owning 75 appartements in Lisbon. Airbnb policy which I confirmed said not to give a credit card or security deposit outside of Airbnb platform. Siamak insisted that I provide my credit card. I felt uneasy, refused and was asked to leave. I went to a nice hotel downtown and got a better accommodation anyway including breakfast for less money. Siamak is just an impersonal building owner setting up their own rules and the employee even told me not to trust Airbnb dumb witted staff who was telling me not to give my credit card. To be avoided