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.
Using Priority Mail Express Flat Rate is very simple. As long as your package is not heavier than 70 lbs., you will not need to weigh it. When preparing to ship with Priority Mail Express Flat Rate, you can order the free envelopes or boxes through the USPS website or pick these up at the Post Office. Ensure that your item fits securely within the envelope or box and that the self-adhesive flaps close and adhere to the shipment.