Science is unpredictable and delays to projects happen all the time. This can be through customs delays, project initiation delays, patient recruitment delays and more. For this reason, we implement as standard a pay-as-you-go invoicing process. This means you are charged for the max number of samples you stored with us the previous month, irrelevant of how many you thought were going to arrive with us. Unfortunately, as standard, we are unable to prorata our invoices to the day number (i.e. if they arrived on the 29th of a month it would still count). We do not implement monthly monitoring fees until you deposit your first samples with us, even if the contract is signed.