866-405-9644

Assuming that a post marked check covers you from late fee, then you only deal with due date and thereafter collections calls repeatedly throughout the day, every day, until payment received on their end. Uncertain what their grace  period is, however any payment not received on their end on or before the due date immediately initiates non stop calling. You will not receive a voice message, you will not be responding to a live individual. Best bet if your payment is caught up in the mail is to contact your carrier amd block their number.

The problem with that theory is that the card agreement specifies that the payment must be received on or before the due date. If you are uncertain what their grace period is (which only covers you for late fees) then read your contract (something you should have done in the first place).

Wont give nature of the call. Scammer - would not put through since person doesn't work here.

This number never ceases calling me. I've blocked it several times and it bypass3es the block feature on my phone.

Received a call from this company, caller id showed Synchrony 866-405-9644: (which is a bank)...music was playing then a recording this is not a sales call please, continue to wait while we connect you to the next "available agent".  More music then same message. At this  point I hung up.  This was our first call from this number. Hopefully it is the last.

Calls 3xs a day. Leave no message. Calls 8am sunday

SCAM.........said I needed to make a payment on an account that I do not have!!!!

SCAM.  Say I owe money............I do NOT.

Called early this morning and then three more times during dinner hour

Called and said it was a past due bill on a pay day loan from 2012. Hmmm nope. They have ways of getting information. They didn’t call me, they called my parents!

It said it was synchrony bank.
I called the bank and asked them to verify #. They said it's spam don't respond!