@Manish0749 It doesn't need a barcode. Just send it to

 KPN
Antwoordnummer 10119
2400VB Alphen aan den Rijn

There's a postnl drop point near my apartment. And it's open without barcode 

U have to seal the box with tape, put on the adress and bring it to the Postnl dropbox. You will get a receipt.

And do i have to put the address manually. I have not received any address label.

Yes.

Last time i tried but i was unable to open the postnl post.

Will try again today.

U have to bring it to a package point of Postnl, like Primera or a postoffice.

Ohh, can I not drop it at self service point?

Something like in image

https://www.google.com/search?q=postnl+near+by&oq=postnl+near+by&aqs=chrome..69i57j0i13j0i390.6206j0j9&client=ms-android-samsung-gs-rev1&sourceid=chrome-mobile&ie=UTF-8 #lkt=LocalPoiPhotos&lpg=cid:CgIgAQ%3D%3D,ik:CAoSLEFGMVFpcFAxRHdzWVdSb3d5bXJLaThkSkR0SVFLWEJReXU5UXdKeHRLamNs&trex=m_t:lcl_akp,rc_f:rln,rc_ludocids:737959315392729386,ru_gwp:0%252C7,ru_lqi:Cg5wb3N0bmwgbmVhciBieSIGiAEBkAEBSJKDpJKGsICACFoeEAAYABgBGAIiDnBvc3RubCBuZWFyIGJ5KgQIAhAAkgEcc2hpcHBpbmdfYW5kX21haWxpbmdfc2VydmljZaoBDhABKgoiBnBvc3RubCgA,trex_id:NRUQwc

No, because there is no barcode. You need to handle this personally because you have to get a receipt manually.

Okay. Thanks.