from the Westcord City Centre In the Fine Print
Please note that a deposit of EUR 100 is required upon arrival as safety deposit. This can be paid with your Credit Card. The deposit will be refunded on the day of departure. The release time of the authorization is subject to the bank of the Credit Card holder.
And from the Swissotel Amsterdam
Please note that a safety deposit of EUR 50 per night is required upon arrival, to cover incidentals. This will be refunded at check-out.
From the Crowne Plaza South
Please note that a safety deposit of EUR 50 per night. This can be reserved on your credit card or be paid in cash, which will be refunded upon check-out after inspection of the room.
Hotel Amsterdam De Roode Leeuw
There is nothing about a security deposit in the fine print but here is part of one of the reviews
When arrived to check in i was asked to pay a charge of €150 to which I'd get back within 10 working days, which is fine i understand but the hotel did not make me aware of this before i arrived to allow me to make sure i had this on me or my right card, this left me short for my stay, think in future this could of been made aware especially since i was in contact with the hotel several times to pay upfront etc and was even told previously after paid full amount that no other cost would be needed.
Hotel des Arts
Here is one that requires a security deposit in cash and is only returned after an inspection of your room
A damage deposit of EUR 50 is required on arrival. That's about 57.87USD. This will be collected as a cash payment. You should be reimbursed on check-out. Your deposit will be refunded in full, in cash, subject to an inspection of the property.
Even the Movenpick requires a security deposit but does not say how much
There are some hotels that say nothing about a security deposit like The Best Western Dam Square. And there are others.
I always book with free cancellation and I plan on writing any hotel to ask about their policy regarding a security deposit after I make up my mind.
Still doing my research.