i sell online to US customers, for a few unshipped ecommerce orders which are already paid what USA laws do i violate? ?

-- i own 6 ecommerce websites selling online to USA customers. out of every 100 orders sold about 10 or so orders was never shipped but payment was collected already thru Paypal and credit cards. delayed shipping sometimes take 2 months for these unshipped orders to processed due to some no stock issues. what criminal laws do i violate? i have no legal presence in USA. im based in Philippines. this process is called dropshipping wherein my suppliers are in USA and my buyers are also in USA and orders are shipped within USA within 5-6 days using USPS.