How to write the notice urging the facade room to pay the utilities?

Just use the following simple modifications.

Letter on paying arrears as soon as possible

XXX (the name of the opposite company) and X (the surname of the opposite boss) total (or job name);

I am writing to you about your arrears with XX:

On XX, XX, XX, your company signed the XXXX Contract (or "oral agreement reached through negotiation") with our company. Both parties agree that your company will pay XX yuan on XX, XX, and the balance will be paid before XX. Your company also paid some money on XX, XX, XX, but after XX, your company failed to pay a penny as agreed, and now it has accumulated arrears.

In view of the good cooperative relationship between the two parties, we are writing to ask you to pay us the arrears before XX. If you still can't pay on time, we will recover the interest on your arrears according to relevant regulations (or agreements) and even take relevant legal measures. At that time, your company may have to bear greater litigation losses.

I am here to convey

welcome

XXXXXX company

Date, year and month