United States Postal Service uses PS Form 3877 for Firm Mailing Book for Accountable Mail. This mailing book is also known as Guide to Firm Mailers. You can see the form below:
PS Form 3877:
United States Postal Service uses PS Form 3877 for Firm Mailing Book for Accountable Mail. This mailing book is also known as Guide to Firm Mailers. You can see the form below:
PS Form 3877:
