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Dear chess friends! J am sorry for inconvenience for You and J know, my question is to no real address,
but J am new in Your site
J wish to cancel some match and use option revoke in FAQ. J fill in match ID,
for example m1355683892, fill in above my username (georgedimitrov) and password (5507141029)
and sent recive note as follow.
There was an error processing this request.
The error returned is:

is not a valid post ID.

Please help me and thank You in advance!!

With best regards georgedimitrov!!

Revoke is the same as Unjoin. It only applys to a match that has not been started yet.

Once a match starts, you can't unjoin it.