: Customer service can be inconsistent. Some Sam's Club reviewers reported delays at pickup counters or poorly packaged stamps that were ruined by adhesive tape. Online Shipping Software (Stamps.com / Pitney Bowes)
: You avoid the risk of counterfeits, which the U.S. Postal Inspection Service warns are prevalent on third-party sites. buy postage stamps
: High-volume business users or those wanting to print postage at home. : Customer service can be inconsistent