Used stamps exchanges.

Just received 50+ stamps from Netherlands with no name other than ID NL-624.
Tried to register but rejected with "this ID is for someone else"
Contents of lot was DDR stamps.
Where do I go from here?

Also, the sender of NL-624 from 25stamps.club is not a member on 50stamps.club. You can register this ID on 25stamps.club

Most probably this ID is from 25stamps and for some reason it contains 50+ stamps. It is for your account there.

Good morning Danubius. All the info I have is the ID NL-624. The outside envelope had no markings except the ID NL-624. No return address and even the postmark was unreadable. Only way I know it was from Netherlands is from the stamps and the ID nr.
Contents were all DDR stamps and nice ones at that.
NL-624 is from 25stamps.club as it is too low for either 50 or 100stamps.
I have received 631 and 597 so it must have sent somewhere between Oct 18, 2023 and Jan of 2024.
Hopefully you can track it down. It should have been sent not too long ago.
Thanks for your help.
stamp90

Hi, That ID is for someone else. I'm not sure who sent you that letter. You can send me a PM with details about the name, city. I will try to search for that member.

I have heard nothing on this query. Is anyone familiar with the ID NL-624?
I would like to know who sent it to me so I can register if it was for me.
Help.