I've personally tried to contact the former tenants and ask for the receipt of the utility bill, but their phone numbers have changed in the meanwhile and I've had no luck. 

But what about this option - you get on the phone with the individual and a realtor and let this person give the realtor access.

I live on the beach in FL and do all my biz OOS, MY phone seldom rings. 

IMHO Have campaigns for phone text email follow upHave a phone system Have a text system Have an email system Have chat both external and internal Have webforms Have RVMHave conference roomsHave file storage Have a CRM attached and seamlessly churning data  I use calltext.com however I also own it. 

I carry my phone with me at all times, and approve all requests within a few minutes if I can.  

Late-night unexpected phone calls from tenantsB.

Pick up the phone, get out, and talk to people. 

I pulled the phone Call and listened to it.

I know Brian will personally talk with you by phone and you can compare him with the others.

If you're just starting out, I recommend getting comfortable speaking with sellers over the phone.