can i use this priority mail envelope for this depop package? i ordered a bunch of these and never used them and i know theres strict rules with them. : r/Depop
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I was mailed something this week in an 11-year-old USPS flat rate envelope : r/mildlyinteresting
Using Pirate Ship and a USPS Priority Flat Rate Padded Envelope. Question in the comments. : r/Depop
Priority Mail® Forever Prepaid Flat Rate Legal Envelope – PPEP14L | USPS.com
