Often traveled to New York City on the weekends, often asking to leave from work early on Fridays. Took classified documents home with her and retyped them. Gave the retyped documents to Gubitchev when she visited him in New York.

Requested a special document containing a list of suspected Soviet spies. Director Hoover personally delivered a fake version of the document to Coplon's supervisor, who immediately provided it to her. Coplon, upon receiving the document requested the rest of the day off and then traveled to New York for the weekend (followed by FBI agents - January 14, 1949).

Was trailed by FBI agents around Manhattan until she finally met with Gubitchen in a restaurant. After exchanging documents, the couple left and boarded a subway train. As the doors to the train were closing, Gubitchev bolted from the train and evaded the trailing FBI agents.

Having been observed passing documents, Coplon was transferred to another division of the Department of Justice, in order to keep her away from sensitive documents. Coplon continued to seek access to such documents, volunteering to aid her replacement in getting up to speed.

Requested additional classified information that her supervisor had recently obtained (fake information received from Hoover). Her supervisor left the information in Coplon's view and left the room. Coplon left the room and caught a train to New York (March 6, 1949).