Release liner for mailer packages

A method, comprising:

• stationarily mounting a stack of mailer packages to a surface, the stack including a plurality of stacked release liners fixedly coupled to each other and a plurality of mailer packages, each of the mailer packages of the plurality of mailer packages has a respective closure flap adhered to a corresponding release liner of the plurality of stacked release liners by a corresponding adhesive layer;
• decoupling a first mailer package of the plurality of mailer packages from a first release liner of the plurality of stacked release liners, including the respective closure flap of the first mailer package and the corresponding adhesive layer, from the corresponding release liner of the plurality of stacked release liners, by pulling the first mailer package away from the first release liner, thereby decoupling the respective closure flap of the first mailer package and the corresponding adhesive layer from the first release liner and leaving the first release liner coupled to the rest of the plurality of stacked release liners;
• placing an item within a cavity of the first mailer package through an opening in the first mailer package;
• and
• sealing the opening of the first mailer package by contacting the adhesive layer to a surface of the first mailer package.