Tenants don't agree on security deposit refund

[Kai G.]

Apartment was rented to tenant A and B as roommates (individuals). Tenant A paid entire security deposit on Avail platform, using ACH. After move-out, tenant B tells me he wants 100% of security deposit refund returned to him, made out to a company (probably owned by him), also at an address that does not match the address that was on the lease. I check with Tenant A, and he disagrees, indicates the two may have a dispute involving a business they both own. Tenant A tells me I should hang on to deposit until they agree on where to send security deposit refund. Tenant B then sends email to both Tenant A an myself, showing proof of deposit coming from a certain account (I only see last 5 digits), that he claims is the account of the business he wants me to return the money to. I replied I need a signed statement by both parties, telling me where to send the deposit, and whom to make the check out to. This was over 30 days ago, and they have not gotten back to me.

What would you do? Would you wait, or would you make the check out to both individuals and let them "duke" it out? If so, where do I send the check???