Is there an algorithm to detect if a tracking number is a valid fedex tracking number or not ?
100833
1) If Fedex Express : \nTracking number: 123456789012\n\nConsider 1234567890[1][2], the marked 1 is the tens place and the marked 2 is the ones place. \nStart with the tens place of the tracking number and move left. Multiply each digit with 1 or 3 or 7 in that order and add up the products.\n\n(1*3)+(2*1)+(3*7)+(4*3)+(5*1)+\n(6*7)+(7*3)+(8*1)+(9*7)+(0*3)+\n(1*1) = 178\n\nThen perform a modulus (remainder) operation with 11, 178 % 11 = 2. This is the check digit.\n\nThe check digit is 0 in the case of 10. This digit should equal the ones place digit of the tracking number to pass the "is it a fedex tracking number ?".\n\n2) If Fedex Ground :  http://www.fedex.com/us/certifiedsolutions/ppe/FedEx_Ground_Label_Layout_Specification.pdf
122351
68101  You couldve looked it up at the usps website
177279
Here's an easy way:\n\npublic static boolean isNumber(String number) {\n   try {\n      Long.parseLong(number);\n      return true;\n   }\n   catch(NumberFormatException e) {\n      return false;\n   }\n}
144990
They are already working on this scam. It doesn't look like they are making any progress. If you lost any money, you'll never see it again. If it's a spam e-mail, forward it to the Federal Trade Commission.
64663
Hate to be the bearer of bad news, but if you didn't send it with a track number, then you are not going to win this one. Always, Always, Always send your item with a tracking number. You have no proof that you sent the item so you automatically lose when the customer complains to Paypal.
64250
You can, but they will not have any information for you.  The Post Office is responsible for the package and its delivery.  Customs usually just inspects packages and let the postal service deliver the item.  There is usually no tracking unless it was set by Registered Mail.  International mail is not tracked, unless sent by a service like FedEx or other private carriers.
754534
Since you didn't pay for delivery confirmation to get a tracking number, you can scan your USPS receipt and email it to him as proof (remember to circle his line item).  Just say its your first time and you didn't know.  Be nice, he will understand.
747336
Start with a mail trace with the post office.  Most items with a tracking number require a signature. If they have indeed been delivered, you can ask the person or company that sent you those packages who signed for them.\n\nTry not to assume it is your neighbor, unless you have the proof from the mail trace that they did sign for it.\n\nWere the packages sent by something called "Delivery Confirmation"?  If so, nobody has to sign for it, all that has to happen is for the postal carrier to scan a bar code on the box when he or she drops it on your door step.  If that is the case, then anyone walking or driving by could just pick it up.\n\n\nFirst thing to do: File a formal complaint with the Post Office about the constant screw ups with letter delivery.  You need to do this each and every time you end up with your neighbor's mail.  Stop bringing your mail to your neighbor. Make the postal carrier come and get it and deliver it properly.  I know you want to be nice about it, but it sounds to me like your local post office or the individual carrier is lazy or sloppy.  After a while, they will get tired of you filing complaints, and they will start doing the job right so they wont' have to keep hearing from you.\n\nMake sure you file a lost mail trace on your missing packages. This will give you the information on where it was actually delivered, and who signed for it.\n\nIF and only if you have proof that your neighbor has signed for or taken in your packages, then you can file a complaint.  You will need the proof from the mail trace before your local police will be able to do anything.  They can't arrest someone on suspicion.\n\nThe local police will also want to brush things off onto the post office, saying the post office is the one with jurisdiction. Don't let them brush you off.  Tell then you have already filed a report with the Postal Police, and that the Postal Police told you to ALSO file a complaint with the local police. Once you do that, pick up the phone and do just that...call the Postal Police and report that (whoever it turns out to be) has been interfering with the delivery of your mail.  The first thing they will ask you is if you have filed a complaint with your local police (you see now why you need to do both? They aren't trying to weasel out of things, they just want to make sure they are dealing with a real theft, and not just something that is missing).  You can then tell the Postal Police that you did, and that the local police gave you a hard time.  It will be investigated.\n\nKeep in mind that willfully stealing or holding someone else's mail is a FEDERAL offense.  If someone is taking your packages deliberately, it will not be a slap on the wrist punishment they get.
787633
I have an address I rarely use.  Send it there and I'll check it over (no guarantees).  I think it's xxxxxxxxxxx.  I'll log off and check it and if it isn't the right address then I'll edit this message.  If I don't edit it, assume the address is correct.\n\n\nokay.  It was xxxxxxx
732973
If its automated, it depends on the system they have. Most often they look at the address, credit card number, expiration date -- if any of these three do not match your records the system will not accept the card. Check if you got the expiration and credit card number correctly.\n\nWith some shopping cart systems, they have some fraud protection measures and they raise a red flag if your telephone area code is not the same as the area code for your specified address. They also look at the IP address and match it with the address you gave. If they don't match, that's a red flag
925988
well if ti truly IS your tracking code. someone else got your stuff. you may want to write the guy back and tell him that this shows it was delivered to Michigan and he needs to check again. also have him verify the address he sent it to.. good luck..
423148
http://dhvrm.blogspot.com/2006/04/confirming-e-mail-delivery.html
133714
there is no way for you to find that out on your end unless you will confirm it from them..but the common signs is that the the intended receipent or your emails could not be able to receive any emails from you..but detecting it on your end is impossible..
506953
Hasn't happened to me yet, but I dunno ... I am a VERY curious person, if it was a package or something, I might have to peek inside before I write 'Wrong address' on the box and send it back.
785375
www.constantcontact.com will track any emails sent, and give you feedback on how many bounced or were unopened.
137329
This is a very open question.  There is an algorithm called LUN10 that does some very simple checking to verify that a credit card is a valid card number.  It is also capable of identifying what card type a credit card is.\n\nHowever, to actually verify that a credit card is valid (including AVS checking, etc), would require interfacing with a credit card processing company.  VeriSign offers an XML interface to their credit card processing gateway.  You might want to look into that if that is what you are asking.
635004
Depends on where you got them from. The ones printed out all have a bar code on them because that's how they're checked and scanned. And the fact that you got a "great deal" on them isn't comforting. Depending on the format of the ticket, it may not be legit. But I could very well be wrong on this.