Yes, feel free to borrow one from a family member or housemate. An e.dentifier isn’t linked to a specific person. Just slide your own card into the e.dentifier when you want to do your banking.
If you’ve received a new e.dentifier, but can actually borrow someone else’s, leave the e.dentifier in its packaging and return it to us. You can use the return label to send it back to us (no postage required). Good to know: we will never ask you to send us your debit card. This only applies to the e.dentifier.