# Category 13: Message Addressing Feature Bits

These feature bits control processing after a user makes, gives, or answers a message. They allow a user to make a message confidential, to make a message urgent, to request a return receipt, or to set future delivery.

Bit | Description | Required | Incompatible
--- | --- | --- | ---
018 | Give and mark urgent | 024, 040 |
019 | Answer and mark urgent | 029, 040 |
021 | Make and request receipt | 020, 040 |
023 | Make and mark confidential | 020, 040 |
025 | Give and request receipt | 024, 040 |
027 | Give and mark confidential | 024, 040 |
030 | Answer and request receipt | 029, 040 |
031 | Answer and mark confidential | 029, 040 |
087 | Make and mark urgent | 020, 040 |
095 | Mark message for future delivery | 020, 040 |
284 | Provide Callback Number Delivery Options |  |