Just go into the bank and try and pay it in, don't mention it and see what they say. You could use those deposit point things, its worked for me a couple of times with LTSB.
I recommend take a photocopy of it. Anyone can see that its just the first letter off.
But if this is BofS then expect anything. I once sent a cheque to them and they returned it as it had about 10% of edge torn off. I had to send the photocopy to them saying that it was intact when I sent it!! So somehow when they got it there they tore it!!!
Well miffed.
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