Check Activision's service status, make sure both players are on the same current game version, then add the complete Activision ID shown in Social, including its #number suffix. Clear an old pending request or block first, and ask the other player to send the request in reverse if yours still fails.
Open Activision Online Services and check Modern Warfare plus both players' platforms. If services are available, fully close and update the game on both devices. Reopen it only when each launcher shows the game is current.
2
Copy the complete Activision ID
The other player should open Modern Warfare > Social and read the Activision ID exactly as displayed, including the # and number suffix. Platform gamertags and an Activision display name without the suffix may identify a different or incomplete account.
3
Remove a stale request state
Open Social and check pending incoming and outgoing requests. Cancel an old outgoing request to that player or accept their existing incoming request. Then open the blocked-player list and unblock the intended account if it appears there.
4
Send one fresh request
In Social, choose Add Friends, enter the complete Activision ID, and submit once. The other player should open invitations and accept the request. Avoid repeated submissions while the first request is pending.
5
Try the request in reverse
If sending still fails, have the other player use your complete Activision ID and send the request from their account. Check incoming invitations in Social and accept it there.
6
Verify the connection
Both players should reopen Social and confirm the other Activision ID appears in the friends list. Send a party invitation and verify that it reaches the other player; this confirms the Social connection, separate from session or NAT problems.
If it does not work
If Add Friends reports no player found, recopy the full Activision ID with its #number suffix and check every character.
If a request appears on one side only, cancel that pending request once, restart both games, and send it in the opposite direction.
If the accounts are friends but party invitations fail, troubleshoot the session or connection separately; do not unlink either platform account.
If both updated players cannot send or receive requests while services are healthy, record both platforms, the time, and the exact error for Activision Support without sharing passwords or verification codes.
ⓘ Sources and verification
Checked against official documentation on . Scope: Windows, PlayStation, Xbox.
Source-checked against Activision's current Social-menu and account guidance. No real friend request was sent during review.
