Amazon reportedly pushed USPS to install a mailbox outside its Alabama warehouse, a move the union could use to challenge the outcome of the vote

The union has issued complaints about the mailbox in the past, as the mailbox was installed in February, not long before the start of the mail-in ballot process at the warehouse.

When the mailbox was set up, Amazon blasted workers with emails and texts telling them to “vote no” and put their ballots in the on-site mailbox, Vice’s Motherboard reported.

At the time, the union said the mailbox could make it seem as if Amazon itself would directly see the ballots — a move that could deter employees from voting.

Before the installation of the mailbox, the NLRB rejected the company’s request for employees to vote in person at the warehouse. Instead, the organization opted to allow workers to vote via mail only.