You know how it goes. People change their minds in a heartbeat, let alone over a few days. Maybe her power gets cut off or an emergency bill pops up and she can't afford your package anymore. What then? She'll either send some apology via email or just ghost you entirely...
I wouldn't send it that way. It's just too much of a gamble, and shipping costs are ridiculous. If she happens to miss the delivery, you're stuck paying for the return shipping too, which could easily run you close to $33. Insist that she sends the funds via Zelle or Venmo first, then just ship it through FedEx or UPS.
I believe if you opt for insured shipping, the compensation is only four times the postage cost; so, if there's an expensive piece of clothing inside, you're going to lose a significant amount of money
It's better to use a direct transfer to your checking account. If they don't have one, they can pay cash on delivery when the package arrives, though that adds an extra $1-$2 or more depending on what the package is worth. You could also send money via a money order, which carries its own fee based on how much you're sending.
Of course you can, but if you decide to use a different bank, make sure to include both their routing number and the recipient's full account number—you know, that long string of digits separated by a dash.
Of course you have to pay for the envelope. You can see the shipping cost right there on your receipt. Why even wonder about it? I always make sure to ask questions. My aunt works at the local Post Office, so she knows the drill. She usually tells me whether it's cheaper to send something via certified mail or just as a standard package.
It’s probably a bit tougher since sending it via certified mail ends up costing $6.75. You should just put heavier items in a box and ship them as a package instead of certified; if it's under 11 pounds, you'll only pay about $3.50