1000円札が不足しています。って英語でなんて言うの？

Signs are a good ways to get information across when one doesn't have the time to explain the situation to each and every person. In this case, this may be a good sign to use in a supermarket whereby change needs to be given. When saying that you're 'running short' or 'low on (something),' you are indicating that your resources or provisions are very limited and are soon to run out. It is polite to apologise by adding, 'sorry for the inconvenience'. In this way you are acknowledging that this may cause a minor inconvenience for those you weren't prepared for this.

Using the term 'sorry for the inconvenience' or 'thank you for your cooperation' is always polite when wiring a sign in a shop that may mean service is slightly different from usual. When a store is low on 1000yen notes and you ask customers to use 'small change' it will help the cashier as most customers may be able to pay with 1000yen notes and solve your problem. If a customer uses a larger value note then the cashier will have to provide lots of change and cash-back. It may also encourage people to use card payments.

If you don't have many or alot of something then you are said to be 'low' or 'short' on them by telling your customers it is nice to let them know they might also help by giving you some as payment if they have some Cooperation means to help each other and inconvienience means to cause someone difficulty or not be helpful

"We are running low on 1000 yen bills, sorry for any inconvenience" 'running low' is a very familiar and casual term of describing something that is decreasing or are low on, ex. "we are running low on laundry detergent at home" "I am running low on money so I can't make tonight's party." 'inconvenience' is a polite and formal way of describing trouble and/or difficulty. "cooperation" is used formally and politely to express working together or assisting.

It's common to use the phrase, "running low on" or simply "low on" when describing that you are lacking a sufficient of something, i.e., "running low on soap," etc. However, if this causes inconvenience to customers, you can say that you are sorry for it. You can also say that you appreciate their understanding and/or their patience. This helps customers to feel less annoyed when faced with having to use different forms of payment or pay with different bills.

Always apologize for the inconvenience as it will avoid people getting annoyed at something that is out of your control. It is also polite to apologize when business is different to normal.

My first sentence simply explains the problem that you are low on 1000 yen bills. It's very straightforward. In my second sentence, I say that "small bills" are appreciated. This communicates that I am low on small bills (like 1000 yen or $1 and $5) and that I would appreciate payment in those if possible.