How to post citizenship certificate to PO

[Laller]

Hi, I know its a stupid question, but how should I post my citizenship certificate to the passport office to prevent any damage or loss? I mean I want to get it back without the mark of folding. Should i put it in a folder and post it in that?
Thanks for any advice..

[Lopand]

Send it in a strong A4 envelope, preferably using Royal Mail Special Delivery, so you can track the delivery. You can put it first in a transparent document bag if you wish. It should be sufficient.

[CULLINAN]

Hi, I know its a stupid question, but how should I post my citizenship certificate to the passport office to prevent any damage or loss? I mean I want to get it back without the mark of folding. Should i put it in a folder and post it in that?
Thanks for any advice..

You can send it in an A4 “no fold” envelope. However, HMPO will use a normal envelope to return it, it may get wrinkled yes.

[Laller]

Thanks for the advices!