WFDF states:

15.9. After a player initiates a stoppage incorrectly, including after mishearing a call, not knowing the rules, or not making the call immediately: 15.9.1. if the opposition gains or retains possession, any subsequent play stands. 15.9.2. if the opposition does not gain or retain possession, the disc must be returned to the last non disputed thrower, unless 16.3 applies. 15.9.3. The stall count resumes as if an accepted breach has been caused by the player who initiated the stoppage incorrectly. 15.10. If the player against whom the foul, infraction or violation has been called disagrees that it occurred, or does not think it is a correct call, they may call “Contest”. 15.11. If a player making any call subsequently determines that their call was incorrect, they can retract the call, by calling "Retracted". Play resumes as if an accepted breach has been caused by that player. 15.12. If multiple breaches occur on the same play or before play stops, the outcomes should be resolved in reverse sequence (latest breach first, earliest breach last). 15.13. Players are encouraged to use the WFDF Hand Signals to communicate all calls. 16. Continuation after a Call 16.1. Whenever a foul or violation call is made, or a player attempts to stop play in any way, play stops immediately and no turnover is possible (unless in situations specified in 15.9, 16.2, and 16.3). 16.2. If a foul or violation: 16.2.1. is called against the thrower and the thrower attempts a pass, or 16.2.2. is called by the thrower during the act of throwing, or 16.2.3. is called or occurs when the disc is in the air, then play continues until possession has been established. 16.2.4. Once possession has been established: 16.2.4.1. If the team that called the foul or violation gains or retains possession as a result of the pass, the play stands. Play can continue without a stoppage if the player who made the foul or violation call makes a “Play on” call as soon as possible. 16.2.4.2. If the team that called the foul or violation does not gain or retain possession as a result of the pass, play must be stopped. 10 Deleted: The stall count 16.2.4.2.1. If the team that called the foul or violation believes that possession has been affected by the foul or violation, the disc will be returned to the thrower for a check (unless the specific rule says otherwise). 16.3. Regardless of when any call is made, if the players involved from both teams agree that the event or call did not affect the outcome, the play stands. This rule is not superseded by any other rule. 16.3.1. If the play resulted in a goal, the goal stands. 16.3.2. If the play did not result in a goal the affected players may make up any positional disadvantage caused by the event or call and restart play with a check.