An accommodation bill is a bill of exchange drawn and accepted without any real business transaction.

It is created only to:

Help one party raise short-term funds

Provide financial support to another party

In this case:

One person agrees to accept the bill

The other person discounts it with a bank

The money raised is used temporarily

The parties later settle the amount between themselves

In simple terms, an accommodation bill is a friendly bill created to help someone get temporary finance, not for a real sale of goods.