i used to send cash thru the post using the orange signed for sticker......they are only proof the item reached the address nd so i now realise theres no safe way to send cash i learnt the hard way fter losing £25 in cash!
you cant send unless youve had payment tis not your fult its his/her folly!
If it's a personal cheque then she can stop the cheque and send you another one. She's only lost the postage. She can check with her bank if someone's got hold of it and cashed it. Ask her to send it again.
Avenalife - sorry, had to disappear. Thats special delivery too - you can get the silver bag or use the silver sticker. If it's silver its special delivery and that is the only way you should send cash by royal mail. It used to be known as registered so people often confuse it with recorded (which is the orange sticker). Recorded is effectively normal post but with a signature at the end so you can prove delivery.
i would say to prevent further loss of her money that you will re list the item as has been going on to long now and cash ideally shouldnt be sent in post and if she does she needs to send it special delivery or send postal order
give her 1 more week and tell her if no cash recieved in 1 week you will relist the item as you have nbeen fair letting it go on this long