Access Card was inside receiver when I mailed it out - DirecTV

I cancelled my Directv service about 3 1/2 weeks ago and was told I would not need to return any of the equipment since it was old, only the access card and it would have to be done within 21 days. They said I would get an envelope to return the access card within 7 business days. 2 weeks went by and still nothing came in the mail. So I called and they said they'd send me another envelope. When I got home from work that day I saw a slightly bulky envelope from Directv. When I opened it, it contained a larger shipping envelope with prepaid postage. I figured they did end up wanting my receiver too and so I mailed that out. It's been a week since I mailed it out and today I got a small envelope from directv for my 'access card'. Does anyone know if they'll still get the access card since it was left inside the receiver or will that just go to some recycling place? I honestly thought I was following their instructions correctly and now I'm scared they'll charge me