6 published complaints: 5 unresolved (3 operator declined to engage), 1 resolved for the player.
CoinsBack has one recovered payout on the SweepsGuard record against five unresolved redemption complaints. The recurring pattern is redemptions that stay pending past the stated window.
It replies but does not engage on substance. Three cases — #142, #149 and #179 — closed as Unresolved — Operator Declined to Engage. On Case #179 CoinsBack answered three times in five days without ever addressing the account, including running an account lookup against SweepsGuard's own email rather than the player ID supplied.
CoinsBack holds a grade C on SweepsGuard. Players should document every redemption request and timeline, and escalate in writing if a payout passes the stated window.