Clue: Yellow card issuers, briefly

Answer: REFS

Length: 4

---

Similar Clues:

• Card reader, briefly (ATM with 3 letters)
• Card or Met, briefly (NLER with 4 letters)
• "Don't leave home without it" card, briefly (AMEX with 4 letters)
• Credit card users may be asked for them, briefly (IDS with 3 letters)
• Credit card with a Roman gladiator logo, briefly (AMEX with 4 letters)
• Game with red, yellow, green, and blue cards (UNO with 3 letters)
• Packs of cards, briefly (DKS with 3 letters)
• Employee cards and such, briefly (IDS with 3 letters)
• Yellow-card (WARN with 4 letters)
• Wallet cards, briefly (IDS with 3 letters)