Before transferring
Create the order in the official cashier and check its displayed account details and expiry. In the bank app, check the returned recipient name and the amount against the current instruction. If there is a mismatch, stop and ask through official support. Some cashier instructions are for a specific order and should not be reused.
After transferring
Save the bank receipt and cashier order. If you see a debit, do not repeat the transfer to force the cashier to update. Check whether a separate reversal has appeared, and ask the operator to locate the deposit against its order and the bank reference.
Worked example
You send an illustrative ₦2,000 and the bank marks it successful, but the cashier is pending. Save the amount, exact time and both references. Ask whether the operator can locate and credit the original order. If support says a reversal was sent, look for the matching credit in the bank history.