USPS Stamps

Error "Insufficient Postage"
When coming across the "Insufficient Postage" error, this means more credit should be bought from Stamps.com as what is currently available is not...
Mon, 4 Mar, 2024 at 3:20 PM
Shipping to overseas US military bases (error: value of customs line item must be a positive numeric value..)
Shipping to overseas US military bases is considered as export operation by stamps and requires customs information. You need to specify UNIT PRICE for ...
Tue, 24 Oct, 2017 at 3:54 AM
Stamps.com Address Validation Rules
v   Criteria High Med Low   Legacy All validation issues flagged with Alert Notification Yes No No   ...
Wed, 24 Feb, 2021 at 11:06 AM