How to pray for them if they don't give their name

As I have been going door to door, I take down prayer requests. Some people get added to our prayer list, even if they don't mention a prayer request. How is that, you might ask? If in the course of discussion, it is determined that the person is not a Christian, then I add a prayer request for their salvation. In many of these cases, the person had not given me their name. So, we have ended up with a number of prayer cards that say "Name: not given" or "Name: Unknown". Now God knows who the person is living at such and such an address, so when we pray God knows the need. However, I've found a way to make the pray even more personal. Whitepages.com offers a "reverse lookup!" With reverse lookup you can look up a name based on knowing the address or the phone number. It's not 100 percent - probably due to unlisted and such, but it is at least in the 95 percentile based on searches that I have done. So, next time you are praying over that prayer card where you did not get their name, go look it up in the Whitepages Reverse Lookup!