In some cases, merchants may hold a small payment to verify your PayPal account. The hold is usually released within 3 to 5 days. Billing Agreement. When you establish a Recurring Payment with a merchant, you are also entering into a Billing Agreement with PayPal. By entering into a Billing Agreement you are authorising PayPal to allow the merchant to charge your Nominated Payment Source directly.
How much is too much? Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two energy shot drinks. Although caffeine use may be safe for adults, it's not a good idea for children. And adolescents should limit themselves to no more than 100 mg of caffeine a day.
Though it is impossible to recommend a safe range of caffeine intake, most studies show that adults can take in 200 to 300 milligrams safely each day. This is equal to two to four cups of coffee. However, that might be too much for many people, who could feel jittery and on-edge after only one cup.