My name is Ashis and I am from Bhubaneswar, Odisha.

I ordered some Oil paintings from AliExpress. They were rececived at EMS Kolkata off and now the Aliexpress Courier tracking status showing as " Air,CED KOLKATA,Retention reason: Retained by customs for unspecified reason ". Please let me know what does it mean? any reason to worry?

please reply. Thanks in advance.