[mousecorkkey]

I can't say I've ever seen an RFID tag sewn into clothes in either of those two shops - however I don't shop there too often.

I've seen the tamper proof clips

https://www.alibaba.com/product-detail/58khz-clothing-anti-t...

and the RFID in the tags

https://www.alibaba.com/product-detail/EPC-Gen2-sewable-RFID...