Geoff Aaron is like many customers at Meijer Grocery stores across Metro Detroit. Several stores have signs posted on their doors, for everyone to see. The signs say Due to the national coin shortage, self-checkout registers are electronic payment only. I dont, carrying cash now a days, especially with the, (you know) I mostly use my card anyways, said Aaron. While we understand this effort may be frustrating to some customers, its necessary to manage the impact of the coin shortage on our stores.