Social Security Disability back pay will be paid in a single lump sum and will be reduced by the amount of SSI already paid for months when eligibility for the two programs overlap. The second SSI installment is due this month, but sometimes the installments are delayed.
The medium flat-rate boxes for Priority service are 13 5/8 inches by 11 7/8 inches by 3 3/8 inches and 11 inches by 8 1/2 inches by 5 1/2 inches. Shipping charges are $12.65. There is one small-size box offered for Priority service. It measures 8 5/8 inches by 5 3/8 inches by 1 5/8 inches and costs $5.95 to ship.
Priority Mail Express Flat Rate Envelope. 12-1/2 x 9-1/2. Please Note: This product ships in packs of Singles (1-5) and packs of 10. An order of 1 equals 10 or (1-5) boxes depending on your selection under Format. The Priority Mail Expressâ¢ Flat Rate Envelope offers our fastest service for time-sensitive letters, documents or merchandise. Guaranteed next-day and second-day delivery nationwide or your money back.