According to MoneyGram, you just need to call their Customer Service at 1-800-MONEYGRAM (English line) or 1-800-955-7777 (Spanish line) if any of the information you provide changes before the recipient collects or receives the money.
Alternatively, you can just email them using the online contact form here.
MoneyGram offers two service levels when sending online:
- Same Day Service, using your Debit or Credit or Prepaid card; funds will typically arrive in minutes 10 minutes
- Economy Service, using your Bank Account (checking or savings); funds will typically arrive in three business days
Find the latest news on MoneyGram on Twitter @MoneyGramMe.