If you use a prepaid card when checking in to a hotel or hiring a car, it’s likely that the company will put a transaction on your card that will remain pending. This means the funds are blocked, but not taken by the merchant. Companies do this to cover themselves against non payment.
The money will be blocked for 30 days. To avoid this, please give the company a normal debit or credit card to “guarantee” the payment, and then use the Equals card when you make the final payment.