I've been using american express serve for three years. I've previously rented hotels and have had an incidental charge held for 10 business days for three years. Until recently aug 2021 i've had 400 dollars worth of incidentals that they are now advised can hold up to 30 days. I've never had my funds held that long and wouldn't have used the card if i'd known they would hold it that long. My transactions from before never took that long but their implying it's always been their policy. You t hasn't. They are holding my funds gaining interest and not allowing to to access for 30 full days. I recommend anyone using this service to not expect any holds to release for 30 days. I was blind sided and they can care less