Delivery & Read Receipts

Delivery and read receipts let you show checkmark indicators (✓ delivered, ✓✓ read) next to messages in your chat UI. The CometChat Unreal SDK delivers these as real-time events through the OnReceiptReceived delegate.

Listen for Receipt Events

Bind to the OnReceiptReceived delegate on the Subsystem.

Blueprint
C++

Get a reference to the CometChat Subsystem
Drag off and search for On Receipt Received
Use Bind Event to connect it to a custom event
The custom event receives an FCometChatReceiptEvent parameter

void AMyActor::BeginPlay()
{
    Super::BeginPlay();

    UCometChatSubsystem* Chat = GetGameInstance()->GetSubsystem<UCometChatSubsystem>();
    Chat->OnReceiptReceived.AddDynamic(this, &AMyActor::HandleReceipt);
}

void AMyActor::HandleReceipt(const FCometChatReceiptEvent& Event)
{
    if (Event.Status == TEXT("delivered"))
    {
        // Show single checkmark ✓
        MarkMessageDelivered(Event.MessageId);
    }
    else if (Event.Status == TEXT("read"))
    {
        // Show double checkmark ✓✓
        MarkMessageRead(Event.MessageId);
    }
}

FCometChatReceiptEvent

Property	Type	Description
`MessageId`	`FString`	The message this receipt applies to
`Uid`	`FString`	The user who triggered the receipt (the recipient)
`Status`	`FString`	`delivered` — message reached the device; `read` — message was viewed
`Timestamp`	`int64`	Unix timestamp when the receipt was generated

Receipt Flow

A read receipt implies delivered. If you receive a read event for a message you haven’t seen a delivered event for, treat it as both delivered and read.

Authentication

Messaging

Users & Groups

Reference

Listen for Receipt Events

FCometChatReceiptEvent

Receipt Flow

Next Steps

Connection Status

Real-Time Events

Authentication

Messaging

Users & Groups

Reference

Documentation Index

​Listen for Receipt Events

​FCometChatReceiptEvent

​Receipt Flow

​Next Steps

Connection Status

Real-Time Events

Listen for Receipt Events

FCometChatReceiptEvent

Receipt Flow

Next Steps